I'm experiencing the exact problem described, except that I don't have the "." zone described. How can I get this working?

PS I totally don't understand what is meant by:

What your going to want to do is set your DNS server to forward to the DNS server of the ISP provider. That should solve the issue... Now i'm not exactly sure where that settings is, but give me a bit and i should be able to find it.
Any help you guys could give would be muchly appreciated.