hi everybody!

i writed a application client/server following:
client(MIDlet write by J2ME run on mobile(HTC)) and Server(write by J2SE run on PC).
on emulator(i used Netbean) thi ok.run good!

but when i install client on HTC to connect to Server run on PC thi on client(Screen HTC) it display EXception(java/lang/unsupportedOperationException)!

why??????please help me!!!!
thanks for advance!!