Draytel and N95 "Please purchase some pstn credit and try again"

Hello

I have setup Draytel.org on my N95 via inbuilt sip client.

I have purchased £10 credit on my draytel account.

I can seem to recieve calls and make calls to sip urls.

However if I dial a pstn number, i get a voice saying "Please purchase some
pstn credit and try again"

Now this obviously isn't being generated by the n95, and must be draytel
service

Anybody else have this problem?

Draytel my account has been tested on another device and works fine.