IOException during HttpConnection

I`ve developed a midlet to submit a score to a server and get back a response- ok, failed etc.
Below is the loop which connects to the url. It all runs fine on Nokias but throws a IOException when run
on Sony Ericsson (K700i) and Motorola (V3,V525,V500).
It seems to be thrown when the in = hc.openDataInputStream(); call is made.
When i attempt to connect, i get the screen asking whether i should allow the connection and then it fails.
Can anyone help??

I am unsure as to which hc.setRequestProperty to set. Could this be effecting it?
The url is a WAP page.

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public void run()
{
      while(running)
      {
            HttpConnection hc = null
            InputStream in = null;
            OutputStream out = null;
            StringBuffer b= new StringBuffer();
      
            try
            {
                  hc = (HttpConnection)Connector.open(url);
                  hc.setRequestMethod(HttpConnection.GET);
                  //hc.setRequestProperty(" Content-Type" ," application/x-www-form-urlencoded" );
                  //hc.setRequestProperty( " User-Agent" , agent );
                  //hc.setRequestProperty( " Content-Type" , type );
                  //hc.setRequestProperty( "Content-Length" , Integer.toString(url.length()) );

                  out = hc.openOutputStream();
                  in = hc.openDataInputStream();
                  int ch;
                  System.out.println(" Responed= " );
                  while((ch=in.read()) != -1){
                        b.append((char)ch);
                        System.out.println((char)ch);
                  }
                  doSomething(b);
            }

            catch (ConnectionNotFoundException cnfe){System.out.println(cnfe);}
            catch (IOException ie){      System.out.println(ie);}
            finally
            {
                       running=false;
                  try
                  {
                        if(in!=null) in.close();
                        if(hc!=null) hc.close();
                        if(out!=null) out.close();
                  }
                  catch(IOException ie){System.out.println(ie);}
            }
      }
}