Hi, its working now. i don't know why i disable ICE. the only change i made is enable ice. ( #define USE_ICE 1 ) and with pjsua_vc8d.exe i use command line --use-ice , without this same error before. but with ice , i am getting this message icstr00D2CBE8 Transaction not found, response silently discarded thanks > It's the same machine maybe, but I bet it's not running on Symbian > emulator! > > -benny > > > > > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org >