[SR-Users] SIP Status: 401 Unauthorized (0 bindings)

Hello List, I have a fresh install kamailio 3.2.0 running on ubuntu. Everything seems to work fine according to the logs, I have enabled support for the following: - enabled support to connect to MySQL server - enabled user authentication - enabled persistent user location service - enabled NAT traversal and updated RTPProxy control socket parameter I added a few users with kamctl add user pass but when I try to register with my client I get the following: 8.257745 x.x.x.x -> 10.62.99.103 SIP Request: REGISTER sip:x.x.x.x 8.258462 10.62.99.103 -> x.x.x.x SIP Status: 401 Unauthorized (0 bindings) Here are some detailed logs for the reg process: T x.x.x.x:63171 -> 10.62.99.103:5060 [AP] REGISTER sip:x.x.x.x SIP/2.0. Via: SIP/2.0/TCP 192.168.126.19:4369;rport;branch=z9hG4bK239028812. From: <sip:daniel@x.x.x.x>;tag=303867081. To: <sip:daniel@x.x.x.x>. Call-ID: 1300614569. CSeq: 7 REGISTER. Contact: <sip:daniel@x.x.x.x:63171;transport=tcp;line=5a9552052fb65c8>. Max-Forwards: 70. User-Agent: Linphone/3.5.0 (eXosip2/3.6.0). Expires: 600. Content-Length: 0. . T 10.62.99.103:5060 -> x.x.x.x:63171 [AP] SIP/2.0 401 Unauthorized. Via: SIP/2.0/TCP 192.168.126.19:4369 ;rport=63171;branch=z9hG4bK239028812;received=x.x.x.x. From: <sip:daniel@x.x.x.x>;tag=303867081. To: <sip:daniel@x.x.x.x>;tag=b27e1a1d33761e85846fc98f5f3a7e58.b260. Call-ID: 1300614569. CSeq: 7 REGISTER. WWW-Authenticate: Digest realm="x.x.x.x", nonce="T42z9U+NssnZP82+sdkwPgl1nRk61QDm". Server: kamailio (3.2.0 (i386/linux)). Content-Length: 0. Any help is greatly appreciated.