Problem with pjsip

Hi,
I’m trying pjsip on my test server with asterisk version 13.2. I can’t start asterisk with res_pjsip_keepalive.so, if I noload => res_pjsip_keepalive.so in modules I will able to start but I cant register the softphone. I have recompiled version 13.2 two times. How can I sort this problem?

Many thanks
Sathees