http://cma.zdnet.com/texis/sbver/verifyuser.html?BACK=http://sitebuilder.zdnet.com/trellix/sitebuilder/certify.jsp writes
"

ZDNet SiteBuilder

Important notice: We're pleased to announce big changes to ZDNet SiteBuilder. As of July 14, 2003, your ZDNet SiteBuilder membership became part of ZDNet Rewards, a premium membership service.

Your ZDNet SiteBuilder Web sites will remain intact on ZDNet Rewards. Plus, you will be able to access all of the ZDNet Rewards benefits at no extra charge."

Maybe you need to re-signup or even (shudder) pay?