You should've been sent an email with a link to your personal download page for pro.

Did you get it from www.limewire.com?? If so, the thread below has links to help you sort this out.
http://www.gnutellaforums.com/showth...500#post190500

If you got pro from another site, you were scammed. There's a sticky at the top of this page about membership, it has info & advice on what to do about scams.