NullPointerException in Nokia when creating socket connection

Question

I need a socket connection, The following code works well in simulators.
But in my nokia it throws a NullPointerException,
st.setText("Trying To Connect");
try{
client = (StreamConnection)Connector.open("socket://example.com:6040",Connector.READ_WRITE,true);
st.setText("Connection Estableshed");
is = client.openInputStream();
rt = new ReaderThread(this,is);
rt.start();
os = client.openOutputStream();
wp = new WriterProgram(os);
}catch(IOException ex){
st.setText(st.getText()+ex.getMessage());
I can see "Trying to connect".
But I never see "Connection Established".
NullPointerException thrown says nokia.

Answer 1

Hi,
     If all the users belong to the same role (like all users are Publishers or Writers), then, you can send a single connection key for all the users. But, if users belong to different roles, then, you will have to create connection keys for each role and then send it to the users.
Hope this helps.