I have installed asterisk 11 on Ubuntu 14 using vmware. I am trying to develop a softphone using c# and Ozeki VoIP SIP SDK but for some reasons i can't connect my softphone to register with asterisk. I have also tried Ozeki demo Softphone but still getting the same results. X-Lite and other softphones work fine. I have also used Wireshark to see whats going on. In the Wireshark log, i have seen that there is no sip protocol in x-lite sofphone but in ozeki demo softphone there is sip protocol. -Thankyou
