Hi Nick,
Thanks for responding!
Here's the server's status log:
---
2006/11/12 >>
20:44:26.171|.\SessionMgr.cpp(135)|Log2|CallManager|SessionMgr::run: ** Adding transports **
20:44:26.483|.\SessionMgr.cpp(155)|Log2|CallManager|SessionMgr::run: ** Initialize DUM **
20:44:26.483|.\SessionMgr.cpp(169)|Log2|CallManager|SessionMgr::run: ** Initialize Server Authentication **
20:44:26.483|.\SessionMgr.cpp(174)|Log2|CallManager|SessionMgr::run: ** Initialize Client Authentication **
20:44:26.514|.\SessionMgr.cpp(204)|Log2|CallManager|SessionMgr::run: STUN resolved external IP: 86.90.15.154
20:44:26.514|.\SessionMgr.cpp(215)|Log2|CallManager|SessionMgr::run: ** Initialize Lines Manager **
20:44:26.592|.\DBAccessor.cpp(53)|Log2||DBA: ** Database connection Ok **
20:44:26.608|.\SessionMgr.cpp(219)|Log2|CallManager|SessionMgr::run: ** Initialize Status Monitor **
20:44:26.608|.\SessionMgr.cpp(234)|Log2|CallManager|SessionMgr::run: ** Start Session Manager **
20:44:26.608|.\SessionMgr.cpp(243)|Log2|CallManager|SessionMgr::thread: ** Entering Main Loop **
20:44:30.154|.\SLServer.cpp(10)|Log2||??: SL: connected venerable:0/MediaServer at [venerable]/MediaServer
20:44:30.170|.\MSInterface.cpp(603)|Log2||MediaServerConnected: Media Server is connected
20:47:57.089|.\SLServer.cpp(10)|Log2||??: SL: connected venerable:0/PHPExtension_0 at [venerable]/PHPExtension_0
20:47:58.167|.\LineImpl.cpp(93)|Log2|CallManager|LineImpl::update: Line: register line 31137113039
20:48:10.978|.\SessionMgr.cpp(509)|Log2|Registrar|Registrar:

nFailure: Registration failure: <sip:
[email protected]:51665> for sip:
[email protected]:51665
20:48:36.163|.\LineImpl.cpp(93)|Log2|CallManager|LineImpl::update: Line: register line 31137113039
20:48:41.038|.\SessionMgr.cpp(509)|Log2|Registrar|Registrar:

nFailure: Registration failure: <sip:
[email protected]:51665> for sip:
[email protected]:51665
20:49:32.627|.\LineImpl.cpp(93)|Log2|CallManager|LineImpl::update: Line: register line 31137113039
20:49:41.205|.\SessionMgr.cpp(509)|Log2|Registrar|Registrar:

nFailure: Registration failure: <sip:
[email protected]:51665> for sip:
[email protected]:51665
20:52:27.820|.\LineImpl.cpp(93)|Log2|CallManager|LineImpl::update: Line: register line 31137113039
20:52:41.851|.\SessionMgr.cpp(509)|Log2|Registrar|Registrar:

nFailure: Registration failure: <sip:31137113039%
[email protected]:51665> for sip:
[email protected]:51665
20:52:59.569|.\LineImpl.cpp(93)|Log2|CallManager|LineImpl::update: Line: register line 31137113039
20:53:11.709|.\SessionMgr.cpp(509)|Log2|Registrar|Registrar:

nFailure: Registration failure: <sip:31137113039%
[email protected]:51665> for sip:
[email protected]:51665
20:53:30.458|.\LineImpl.cpp(93)|Log2|CallManager|LineImpl::update: Line: register line 31137113039
20:53:41.817|.\SessionMgr.cpp(509)|Log2|Registrar|Registrar:

nFailure: Registration failure: <sip:
[email protected]:51665> for sip:
[email protected]:51665
20:55:21.062|.\LineImpl.cpp(93)|Log2|CallManager|LineImpl::update: Line: register line 31137113039
20:55:42.139|.\SessionMgr.cpp(509)|Log2|Registrar|Registrar:

nFailure: Registration failure: <sip:
[email protected]:51665> for sip:
[email protected]:51665
20:58:02.585|.\LineImpl.cpp(93)|Log2|CallManager|LineImpl::update: Line: register line 31137113039
20:58:18.303|.\LineImpl.cpp(93)|Log2|CallManager|LineImpl::update: Line: register line 31137113039
20:58:32.959|.\SessionMgr.cpp(509)|Log2|Registrar|Registrar:

nFailure: Registration failure: <sip:
[email protected]:51665> for sip:
[email protected]:51665