603 is received on Server side

[SajjadRaza]

Hi,
I am using gossip in my project and have implemented Incoming Call in my project. Everything works fine untill user relogin to the app or changes the port.
I am calling the configureUserAgent method at that moment and it successfully initialize the new object of GSUserAgent. But when i receive the incoming call, a message of 603 is sent to server. I am no sending this messages to server side at all.
Thanks in advance.