Sip2Sip settings for W52P

[RufusCav]

Hi There
Hoping someone can help.
I have a Yealink W52P Firmware Version 25.73.0.40, Hardware 25.1.0.0.0.0.0.
I am trying to register an account I have just created with Sip2Sip so I can use overseas numbers.
Sip Address is: user@sip2sip.info
Domain/Realm: sip2sip.info
Outbound Proxy: proxy.sipthor.net

I have attached an image of one of the settings I have tried
I have also tried without @sip2sip.info in the user name and register name with user@sip2sip.info in both.

I have also tried the same settings with different Transport methods as well.

I'm probably missing something really obvious.

Any help is much appreciated

Thanks
Rufuscav