Need help swapping between States (FIXED)

Hey, I'm having difficulty figuring out why I cannot swap between 2 different states, the game just crashes after I click the button to make the switch. Was just wondering if someone could give me a hand?

I run the game, click on the high scores button, then the display closes. I was following the SlickBox example http://slick.cokeandcode.com/wiki/doku.php?id=02_-_slickblocks

Sorry about the wall of code, but I really don't know were the issue is.

EDIT: after a bit more debugging it seems to be on the input, when I click anywhere on the screen, it just closes the display, is there anything that could be causing that?

Heres my Main file:

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import org.newdawn.slick.AppGameContainer;
import org.newdawn.slick.GameContainer;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.state.StateBasedGame;
 
/**
 * @author Tyler Matchett
 */
public class CodaClient extends StateBasedGame {
 
   public static final int MAINMENUSTATE = 0;
    public static final int GAMEPLAYSTATE = 1;
    public static final int HIGHSCORESTATE = 2;
    //public static final int OPTIONSSTATE = 3;
    //public static final int LOGINSTATE = 4;
 
    public CodaClient()
    {
        super("Coda - The Code Breaking Game");
 
        this.addState(new MainMenuState(MAINMENUSTATE));
        this.addState(new GameplayState(GAMEPLAYSTATE));
        this.addState(new HighscoreState(HIGHSCORESTATE));
        //this.addState(new OptionsState(OPTIONSSTATE));
        //this.addState(new LoginState(LOGINSTATE));
        this.enterState(MAINMENUSTATE);
    }
 
    public static void main(String[] args) throws SlickException
    {
         AppGameContainer app = new AppGameContainer(new CodaClient());
 
         app.setDisplayMode(800, 600, false);
         app.start();
    }
 
    @Override
    public void initStatesList(GameContainer gameContainer) throws SlickException {
 
        this.getState(MAINMENUSTATE).init(gameContainer, this);
        this.getState(GAMEPLAYSTATE).init(gameContainer, this);
        this.getState(HIGHSCORESTATE).init(gameContainer, this);
        //this.getState(OPTIONSSTATE).init(gameContainer, this);
        //this.getState(LOGINSTATE).init(gameContainer, this);
    }
}

The state I start in:

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import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.Image;
import org.newdawn.slick.Input;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.Sound;
import org.newdawn.slick.state.BasicGameState;
import org.newdawn.slick.state.StateBasedGame;
 
public class MainMenuState extends BasicGameState {
 
    int stateID = 0;
    
    // Image declarations
   Image bkg = null;
   Image loginbkg = null;
   Image logo = null;
   Image play_button = null;
   Image highscore_button = null;
   Image options_button = null;
   Image quit_button = null;
   Image login_button = null;
   
   // Button effects
   float playScale = 1;
   float highscoreScale = 1;
   float optionsScale = 1;
    float exitScale = 1;
    float loginScale = 1;
    
   float scaleStep = 0.0001f;
   
   // Menu Sound Effects
   //Sound fx = null;
 
    MainMenuState(int stateID) 
    {
       this.stateID = stateID;
    }
 
    @Override
    public int getID() {
        return stateID;
    }
 
    public void init(GameContainer gc, StateBasedGame sbg) throws SlickException {
       // Load the images
       bkg = new Image("res/bkg.jpg");
      loginbkg = new Image("res/loginbkg.jpg");
      logo = new Image("res/logo.png");
      play_button = new Image("res/btnPlay.png");
      highscore_button = new Image("res/btnHighscore.png");
      options_button = new Image("res/btnOptions.png");
      quit_button = new Image("res/btnQuit.png");
      login_button = new Image("res/btnLogin.png");
      
      // Load Sounds
      //fx = new Sound("res/sounds/menu_selection.wav");
    }
 
    public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws SlickException {
       // draw the intro menu
      bkg.draw(0, 0);
      logo.draw(470, 90);
      play_button.draw(0, 90, playScale);
      highscore_button.draw(0, 196, highscoreScale);
      options_button.draw(0, 277, optionsScale);
      quit_button.draw(0, 358, exitScale);
      login_button.draw(0, 505, loginScale);
      
      g.drawString("Username [Highscore]", 570f, 510f);
      g.drawString("Main Menu", 50f, 50f);
    }
 
    public void update(GameContainer gc, StateBasedGame sb, int delta) throws SlickException {
       Input input = gc.getInput();
        
       int mouseX = input.getMouseX();
       int mouseY = input.getMouseY();
        
       boolean insidePlay = false;
       boolean insideHighscore = false;
       boolean insideOptions = false;
       boolean insideQuit = false;
       boolean insideLogin = false;
       
       // Play button
       if( ( mouseX >= 0 && mouseX <= play_button.getWidth()) && ( mouseY >= 90 && mouseY <= 90 + play_button.getHeight()) ){
          insidePlay = true;
       } // Highscore button
       else if( ( mouseX >= 0 && mouseX <= highscore_button.getWidth()) && ( mouseY >= 196 && mouseY <= 196 + highscore_button.getHeight()) ){
            insideHighscore = true;
        } // Options button
       else if( ( mouseX >= 0 && mouseX <= options_button.getWidth()) && ( mouseY >= 277 && mouseY <= 277 + options_button.getHeight()) ){
          insideOptions = true;
        } // Quit button
       else if( ( mouseX >= 0 && mouseX <= quit_button.getWidth()) && ( mouseY >= 358 && mouseY <= 358 + quit_button.getHeight()) ){
          insideQuit = true;
       } // Login button
       else if( ( mouseX >= 0 && mouseX <= login_button.getWidth()) && ( mouseY >= 505 && mouseY <= 505 + login_button.getHeight()) ){
          insideLogin = true;
       }
        
       if(insidePlay){
              if(playScale < 1.015f)
                 playScale += scaleStep * delta;
          
              if ( input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON) ){
                 sb.enterState(CodaClient.GAMEPLAYSTATE);
              }
         }else{
            if(playScale > 1.0f)
               playScale -= scaleStep * delta;
          
              if ( input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON) ){
                 gc.exit();
              }
         }
       
       if(insideHighscore){
              if(highscoreScale < 1.015f)
                 highscoreScale += scaleStep * delta;
          
              if ( input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON) ){
                 sb.enterState(CodaClient.HIGHSCORESTATE);
              }
         }else{
            if(highscoreScale > 1.0f)
               highscoreScale -= scaleStep * delta;
          
              if ( input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON) ){
               gc.exit();
            }
         }
       
       if(insideOptions){
              if(optionsScale < 1.015f)
                 optionsScale += scaleStep * delta;
          
              if ( input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON) ){
                 //sb.enterState(CodaClient.OPTIONSSTATE);
              }
         }else{
            if(optionsScale > 1.0f)
               optionsScale -= scaleStep * delta;
          
              if ( input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON) ){
               gc.exit();
            }
         }
        
       if(insideQuit)
       {
          if(exitScale < 1.015f)
             exitScale +=  scaleStep * delta;
       }else{
          if(exitScale > 1.0f)
             exitScale -= scaleStep * delta;
       }
       
       if(insideLogin){
              if(loginScale < 1.015f)
                 loginScale += scaleStep * delta;
          
              if ( input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON) ){
                 //sb.enterState(CodaClient.LOGINSTATE);
              }
         }else{
            if(loginScale > 1.0f)
               loginScale -= scaleStep * delta;
          
            if ( input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON) ){
               gc.exit();
              }
         }
    }
}

The state I want to switch to:

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import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.Image;
import org.newdawn.slick.Input;
import org.newdawn.slick.SlickException;
import org.newdawn.slick.state.BasicGameState;
import org.newdawn.slick.state.StateBasedGame;
 
public class HighscoreState extends BasicGameState {
 
    int stateID = 2;
 
    // Image declarations
   Image bkg = null;
   
    HighscoreState(int stateID) 
    {
       this.stateID = stateID;
    }
 
    @Override
    public int getID() {
        return stateID;
    }
 
    public void init(GameContainer gc, StateBasedGame sbg) throws SlickException {
       // Load the images
       bkg = new Image("res/bkg.jpg");
    }
 
    public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws SlickException {
       // draw the intro menu
      bkg.draw(0, 0);
      g.drawString("Highscores", 50f, 50f);
    }
 
    public void update(GameContainer gc, StateBasedGame sbg, int delta) throws SlickException {
       Input input = gc.getInput();
       
       int mouseX = input.getMouseX();
        int mouseY = input.getMouseY();
    }
 
}