Hi ALL, I am doing simple registration using pjsua client for TCP . but registration is failing .. by debug i came to know that none of the callback's like , on_connect_complete , on_data_read were getting called .. i am using carbide c++ 1.3 emulator .and 1.0.1 version of pjsip. i tested same for linux. it is working fine .. let me clear the problem in detail 1. Establishing TCP connection :- Here pjsua will lunch listener in 5060 port, establish's TCP connection with random source port. 2. Sending register sip packet and gettting response:- when i send register packet to server , server is responding with 200 response but he is sending response to random source port . but callback's are not triggered to handle this response ... so transcation layer is sending 408 time out response to pjsua. 3. While debugging i came to know that *RunL*() ( then callback's) should be called in ioqueue_symbian.cpp file on getting response . but that's not happening here. Thanks Vinay -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090316/e22ff392/attachment.html>