mapped domain is redericting to primary domains signup page!

Hi,

I am a newB and i have been working on this for 3 straight days! I have installed WP with multisite version 3.01 and it works perfectly. I am trying to add domain mapping and cant get it to work...

my primary domain with the wordpress intalled in the root directory is
http://globalgoldandsilver.com" i added the subdomain "dboa.globalgoldandsilver.com" and mapped it to http://www.diamondbuyersofamerica.com

For some reason it keeps forwarding me over the signup page of the primary as shown below

http://globalgoldandsilver.com/wp-signup.php?new=www.diamondbuyersofamerica.com

any suggestions?

both domains are registered with Godaddy, the primary has the name servers to hostgator and the second has the DNS set as required, not sure what else to do. I also have a dedicated ip address