Hi, I am trying to establish call b/w window messenger (5.0.0482) and X-lite. i am able to place call but communication is one way means voice is transmitted from X-lite to messenger but voice from messenger is not coming. media is established through rtpproxy... is window messenger support symmetric client same problem if both client is window messenger. I think , it is NAT problem. but how to fix the problem can u help version of ser -0.8.13 version nathelper- v 1.51 rtpproxy version - v 1.19 plzz can anyone tell me whats the problem Thanks Ram _______________________________ Do you Yahoo!? Win 1 of 4,000 free domain names from Yahoo! Enter now. http://promotions.yahoo.com/goldrush