Web and WebWorks Development

[sondang]

hi all I create javascript extension for socket client. why my code can't linsten message from server

Below my code :

package connections;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import javax.microedition.io.Connector;
import javax.microedition.io.StreamConnection;

import net.rim.blackberry.api.stringpattern.PatternRepository;
import net.rim.device.api.browser.field2.BrowserField;
import net.rim.device.api.script.ScriptableFunction;
import net.rim.device.api.ui.component.Dialog;
public final class SocketFunction extends ScriptableFunction {
	private BrowserField _browserField;
	public SocketFunction(BrowserField bfRef)
	{
		this._browserField = bfRef;
	}
	private static String URL = "socket://192.168.1.105:8790;deviceside=false";
    public Object invoke(Object obj, Object[] args) throws Exception
	   {
	    //String sb = "IDX|10.30|abgx|9500|2|NI|F|KZ|D\n";
	  
        StreamConnection conn = null;
	   	conn = (StreamConnection)Connector.open(URL,Connector.READ_WRITE);
	   	
	   	
	   	
	   	OutputStreamWriter _out = new OutputStreamWriter(conn.openOutputStream());
	   	String data = "IDX|10.30|abgx|9500|2|NI|F|KZ|D";
	   	_out.write(data+ "\n");
	   	_out.flush();
	   	InputStreamReader _in = new InputStreamReader(conn.openInputStream());
	   	StringBuffer sb = new StringBuffer();
	   	int c = 0;
        while (((c = _in.read()) != '\n') && (c != -1)) {
        	sb.append((char) c);
        }
      String sp = sb.toString().substring(0, (sb.toString()).length()-1);
	  _browserField.executeScript("socketMessage('"+sp+"')");
      _in.close();
	  _out.close();
	  conn.close();
      return UNDEFINED;
		}

}

What wrong ??

Thanks