Hey, Finally I got my username,password and domain for my script. So I have defined as below: #define SIP_DOMAIN "xxx.xx.x.x" #define SIP_USERNAME "rach" #define SIP_PASSWD "mypassword" And my I was told that after registration it should call my phone extension (ext:345) So when I run my executable and call my extension: pjsua_scr(exe) sip:345 at xxx.xx.x.x It shows above line. What Am I missing here? Any help would be great! Thanks! Rachel -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20090915/d80c3f73/attachment.html>