LWJGL doesn't draw my Particles

I've played a bit with particles and wrote my own particle system.
I had it working and changed somethings and now it won't work anymore.

I've searched a long time for the wrong code, but i didn't find anything.

Here's my code:

ParticleEmitter.java

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package com.iceengine.particles;

/**
 *
 * @author penguin
 */
import org.lwjgl.util.vector.Vector3f;
import org.lwjgl.util.Color;
import java.util.Random;
import org.lwjgl.opengl.GL11;
import com.iceengine.j3d.objects.IObject;

public class ParticleEmitter implements IObject{
    private Vector3f position;
    private Vector3f Rotation;
    private int particleLifetime;
    private Color myColor;
    private Particle[] Particles;
    private float size;
    private Vector3f moveTo;
    private boolean GenerateLifetime;
    private boolean repeat;

    public void drawObject(Vector3f theTranslation, Vector3f rotation)
    {
        GL11.glTranslatef(theTranslation.x, theTranslation.y, theTranslation.z);
        GL11.glRotatef(rotation.x + Rotation.x, 1.0f, 0.0f, 0.0f);
        GL11.glRotatef(rotation.y + Rotation.y, 0.0f, 1.0f, 0.0f);
        GL11.glRotatef(rotation.z + Rotation.z, 0.0f, 0.0f, 1.0f);

        Update();
        drawParticles();
    }
    public void rotateX(float angle)
    {
        Rotation.x = angle;
    }
    public void rotateY(float angle)
    {
        Rotation.y = angle;
    }
    public void rotateZ(float angle)
    {
        Rotation.z = angle;
    }
    public ParticleEmitter(Vector3f Position,Vector3f MoveTo, Color color, int lifetime, int particles, float Size, boolean generateLifetime, boolean Repeat)
    {
        repeat = Repeat;
        GenerateLifetime = generateLifetime;
        moveTo = MoveTo;
        size = Size;
        position = Position;
        myColor = color;
        particleLifetime = lifetime;

        Rotation = new Vector3f(0,0,0);

        Particles = new Particle[particles];


        Random generator = new Random();

        for(int i = 0; i < particles; i++)
        {
            Particles[i] = createParticle();
        }
    }
    public void Update()
    {
        for(int i = 0; i < Particles.length; i++)
        {
            Particles[i].Update();
            if(!Particles[i].isParticleAlive())
            {
                if(repeat)
                Particles[i] = createParticle();
            }
        }
    }
    private Particle createParticle()
    {
        float V = (float)(Math.random() * 25);
        float angle = (float)(Math.random() * 360);
        Vector3f velocity = new Vector3f();

        velocity.x = (float)Math.sin(angle) * V;// * moveTo.x;
        velocity.y = (float)Math.cos(angle) * V;// * moveTo.y;
        velocity.z = (((float)Math.random() * 10) - 5) / 10 * V;// * moveTo.z;//generator.nextFloat() % 10)-5) / 10 * V;
        //System.out.println("NEW " + " " + position.x + " " + position.y + " " + position.z + " " + angle + " " + V + " " + velocity.x + " " + velocity.y + " " + velocity.z);
        int life = 0;
        if(GenerateLifetime)
        {
            life = (int)(Math.random() * particleLifetime);
        } else {
            life = particleLifetime;
        }

        return new Particle(size,life, new Vector3f(position.x, position.y, position.z),velocity, myColor);
    }
    public void drawParticles()
    {
        for(int i = 0; i < Particles.length; i++)
        {
            //System.out.println("DRAW " + i + " - " + Particles[i].position.x + " - " + Particles[i].position.y + " - " + Particles[i].position.z + " - " + Particles[i].velocity.x + " - " + Particles[i].velocity.y + " - " + Particles[i].velocity.z + " - " + (System.currentTimeMillis() - Particles[i].startTime));
            Particles[i].drawParticle();
        }
    }

    public boolean isWorkDone()
    {
        boolean workDone = false;
        for(int i = 0; i < Particles.length; i++)
        {
            if(!Particles[i].isParticleAlive())
                workDone = true;
        }
        return workDone;
    }
}

Particle.java

package com.iceengine.particles;

/**
 *
 * @author penguin
 */
import org.lwjgl.util.vector.Vector3f;
import org.lwjgl.util.Color;
import org.lwjgl.opengl.GL11;

public class Particle {
    public Vector3f position;
    private int lifetime;
    public Vector3f velocity;
    private Color myColor;
    public long startTime;
    private boolean alive;
    private float size;
    public Particle(float Size,int Lifetime, Vector3f Position, Vector3f Velocity, Color color)
    {
        size = Size;
        position = Position;
        lifetime = Lifetime;
        myColor = color;
        velocity = Velocity;

        startTime = System.currentTimeMillis();

        alive = true;
    }

    public void Update()
    {
        // Update Particle
        if(alive)
        {
            if((System.currentTimeMillis() - startTime) <= lifetime)
            {
                position.x += velocity.x / 250;
                position.y += velocity.y / 250;
                position.z += velocity.z / 250;

                velocity.x *= 0.975f;
                velocity.y *= 0.975f;
                velocity.z *= 0.975f;
            } else {
                alive = false;
            }
        }
    }

    public void drawParticle()
    {
        /*
        GL11.glBegin(GL11.GL_TRIANGLE_STRIP);

        GL11.glColor3f(myColor.getRed(), myColor.getGreen(), myColor.getBlue());
        position.z = - 2.0f;
        GL11.glVertex3f(position.x+size, position.y+size, position.z);
        GL11.glVertex3f(position.x-size, position.y+size, position.z);
        GL11.glVertex3f(position.x+size, position.y-size, position.z);
        GL11.glVertex3f(position.x-size, position.y-size, position.z);

        GL11.glEnd();
        */
        
        if (alive)
        {
            GL11.glBegin(GL11.GL_POINT);
                GL11.glColor3f(myColor.getRed(), myColor.getGreen(), myColor.getBlue());
                GL11.glVertex3f(position.x, position.y, position.z);
                System.out.println("drawParticle() - " + position);
            GL11.glEnd();
        }
         
    }
    public boolean isParticleAlive()
    {
        return alive;
    }
}

Here's how i use the code:

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          ParticleEmitter theEmitter = new ParticleEmitter(new Vector3f(0,0,0), new Vector3f(1,1,0), new org.lwjgl.util.Color(org.lwjgl.util.Color.WHITE), 4000, 100, 1.0f, true, true);
          
          while(!IceEngine.isEngineCloseRequested()) // Same as Display.isCloseRequested();
          {
              org.lwjgl.opengl.GL11.glClear(org.lwjgl.opengl.GL11.GL_COLOR_BUFFER_BIT | org.lwjgl.opengl.GL11.GL_DEPTH_BUFFER_BIT);
              org.lwjgl.opengl.GL11.glLoadIdentity();

              theEmitter.Update();
              theEmitter.drawParticles();
              
              IceEngine.update(); // Same as Display.update();
          }

I hope someone can help me