Has anyone successfully setup the Mac Telephone sip client to use open vfx?

Proxy: pan.wxnz.net
UserID: 033779698
AuthUser: !Jw87j$xxxxxxx
AuthPassword: qmVk10xxxxxxxxx

I followed this guide but still get 404 when I try and connect to WXC

https://support.onsip.com/hc/en-us/articles/203706444-Telephone-OSX-SIP-Client- 

I put 

pan.wxnz.net in the domain field

AuthUser: !Jw87j$xxxxxxxin user name

AuthPassword: qmVk10xxxxxxxxx in Password

pan.wxnz.net in outbound proxy