Proper domain setup howto

[sintax]

Hi,

I recently installed ISPCP 1.0.2 on a Debian Lenny. Everything went ok.
I have a domain (domain.com) which has alot of DNS entries so I updated the record on my ISP for admin.domain.com and servername.domain.com to point to the new IP of the server I setup.

During setup I set the machine name to servername.domain.com and set ISPCP domain to admin.domain.com. I was able to access ISPCP by entering admin.domain.com

My problem is the following:
I added a new domain using a newly created reseller account called domain2.com under ISPCP

I purchased domain2.com from Godaddy and tried setting the nameserver to servername.domain.com or admin.domain.com but godaddy just responded with: Nameserver not registered.

What is the proper way to set this up? Should I get 2 separate IPs just for this? Also did I set the domain and machine name properly like this? Because under the bind9 db I got ns1.admin.domain.com which is weird.

Sorry for asking such a n00b question but I have been doing Linux for quite some time now but never had to do anything with BIND. The server is running bind9 on port 53.

Please help,

Thanks,
Sintax