[SR-Users] Kamailo - Problems with RTP streaming.

Dear All, I am running a kamailio 4.0.3 server, it was working fine with the features like- audio calling, video calling , SMS (but presence is not working). But from last two days I’m facing problems with RTP packets streaming between SIP clients (IMSDroid clients). Session establishment between two clients works well but without audio and video streaming. And after sometime again it works well. What is this wierd behaviour? Following attachments are Audio calling cases of working and not working (ngrep based), And i have found some errors in Syslog (attached) and my config file for any reference. What could be the problem? How can i solve the issue? Anybody please help me. Regards,