I'm trying to setup my phone to do Internet Calling but can't seem to get a registration going.

I've tried the details on SipDroid and it works just fine but I want use the native Gingerbread support for SIP


My settings are as follows:

Username: my UserID
Password: my AuthPassword
Server: pan.wxnz.net
Optional Settings >
Display Name: my AuthUser
Outbound Proxy: left blank
Port: 5060
Transport Type: UDP


I get the message
Primary account. Account registration failed: (xport.co.nz); will try later.


If I switch the UserID for the AuthUser, then I get a different error:
Primary account. Account registration failed: (transaction terminated); will try later.


I didn't mistype anything as all values have been copied and pasted.