Kuddi: kxmlrpc sample codes

Hi,

I am trying to write a midlet (use kxml-rpc) that uploads data to a servlet (use Apache's xml-rpc) but I kept getting 500 ("server internal error") as a responseCode when I invoked the remote method on the servlet.  Could you provide some sample code for both client & servide sides to sorta guide me back to the correct path?

Thanks in advance.
Basari