This question may sounds silly, is forum signature just your login name? how do you link to your website with your signatures?
You have to click on User CP (above) and Edit Signature. In there you specify a link to your website(s) and also the anchor text. See below this text for an example of a signature:
Make reading FAQ your habit http://forums.digitalpoint.com/faq.php?faq=dp_faq#faq_signatures Please click the link above for more help.