I am sucessfuly able to parse a XML file on emulator(BB) using mds. But on phone my application simply shows UI i.e loading...., no connection to establish on server or no request is received on server.

I am using BB 8900 curve phone.

Can some one help me please in solving problem. my application show UI, but when ever is select login button, which will fetch some xml from server, its only shows loading..., its seems that my app hangs. but i think i need some thing more. Am using WiFi, opera mini is sucessfully running on my mobile.
Did i need mds to run on server too?