Make sure that you only have SIP register set on one server at a time otherwise that will cause problems. I currently have two providers registered with the test server.

i have only one server at a time on the server, i started to register first on test server, i waited like 5 hours nothing happend, then tried to register with voxalot.com then it got registered after some minutes, went back to test base and have now waited again like 5 hours it will not register there :(