(keitai-l) web access problem....,help!!

i want to retrieve a image from an URL,but when  i compile all codes in DOJA emulator and to run it,a error eccurred:


Exception: java/lang/NullPointerException
 com/nttdocomo/io/reference/http/URLParser.parseProtocol (virtual) IP = 9
 com/nttdocomo/io/reference/http/URLParser.<init> (virtual) IP = 28
 com/nttdocomo/io/reference/http/URLParser.<init> (virtual) IP = 6
 com/nttdocomo/io/reference/http/Protocol.checkForMatchingSourceURL (virtual) IP = 43
 com/nttdocomo/io/reference/http/Protocol.checkURLRestrictions (virtual) IP = 12
 com/nttdocomo/io/reference/http/Protocol.open (virtual) IP = 84
 com/sun/cldc/io/ConnectionBase.openPrim (virtual) IP = 7
 javax/microedition/io/Connector.openPrim (static) IP = 135
 javax/microedition/io/Connector.open (static) IP = 15
 javax/microedition/io/Connector.open (static) IP = 6
 com/nttdocomo/ui/MediaConnection.fetchMedia (virtual) IP = 8
 com/nttdocomo/ui/MediaManager.getImage (static) IP = 14
 ConnePanel.<init> (virtual) IP = 21
 ConnectionTest.start (virtual) IP = 7
 com/nttdocomo/dojaemu/Launcher.main (static) IP = 55

Exception: java/lang/SecurityException
 com/nttdocomo/io/reference/http/Protocol.checkForMatchingSourceURL (virtual) IP = 105
 com/nttdocomo/io/reference/http/Protocol.checkURLRestrictions (virtual) IP = 12
 com/nttdocomo/io/reference/http/Protocol.open (virtual) IP = 84
 com/sun/cldc/io/ConnectionBase.openPrim (virtual) IP = 7
 javax/microedition/io/Connector.openPrim (static) IP = 135
 javax/microedition/io/Connector.open (static) IP = 15
 javax/microedition/io/Connector.open (static) IP = 6
 com/nttdocomo/ui/MediaConnection.fetchMedia (virtual) IP = 8
 com/nttdocomo/ui/MediaManager.getImage (static) IP = 14
 ConnePanel.<init> (virtual) IP = 21
 ConnectionTest.start (virtual) IP = 7
 com/nttdocomo/dojaemu/Launcher.main (static) IP = 55

Exception: java/lang/SecurityException
 com/nttdocomo/dojaemu/Launcher.main (static) IP = 183

Uncaught excpetion: java/lang/SecurityException
Method............: 45122c 'com/nttdocomo/dojaemu/Launcher.main (static)
.........

the code as bellow:

import com.nttdocomo.ui.*;
import com.nttdocomo.io.*;
public class ConnectionTest extends IApplication{
 public void start(){
  ConnePanel pl = new ConnePanel();
  Display.setCurrent(pl);
  PhoneSystem.setAttribute(PhoneSystem.DEV_BACKLIGHT,PhoneSystem.ATTR_BACKLIGHT_ON);
 }
}

class ConnePanel extends Panel{
 VisualPresenter vp1;
 MediaImage mi1;
 ConnePanel(){
  vp1 = new VisualPresenter();
  try{
   mi1 = MediaManager.getImage("http://www.google.com/images/hp0.gif");
   mi1.use();
  }catch(ConnectionException ce){}
  vp1.setImage(mi1);
  this.add(vp1);
  vp1.play();
 }
}
-------------------


i use this sdk for DOJA:
ava(tm) 2 Platform, Micro Edition, Wireless SDK for the DoJa APIs (Release 2.2)


can you help me? 


bluebird yan