[SR-Users] UAC module fails to refresh registrations

Hello, I'm using the UAC module to register to remote sip proxies. When starting Kamailio, the UAC module successfully registers with the remote sip proxies as expected. Upon expiration of the registration (refresh interval) the UAC module fails to re-register. I've done some sip traces and found the following: During Kamailio startup the registration process is typical of what you'd expect: 1. UAC module sends registration request without authentication information to remote registrar 2. Remote sip proxy sends a 401 back to Kamailio saying unauthorized 3. UAC module sends another registration request with credentials and registration is complete. After the refresh interval expires, the UAC module performs step 1 from above, and the remote sip proxy sends back a 401 (step 2). At this point, the UAC module doesn't resend the registration request with credentials thus failing to register. I've got the following modparam's set on the UAC module. modparam("uac", "reg_contact_addr", "10.0.0.31:5060") modparam("uac", "reg_timer_interval", 60) modparam("uac", "reg_retry_interval", 300) Anyone have any idea's as to why registrations are failing after the refresh interval?