Joe posted this on the HWI Forum, so I'll repeat the information here.
There is a small change in the forum's URL:
Message from Patrick Clinger, President of ProBoards Forums:
For quite some time now, ProBoards forum URLs have included the server number (#66) in the domain name (e.g. allangels.proboards66.com/index.cgi). ProBoards are happy to announce that all forums have been seamlessly upgraded to numberless URLs.
When accessing your forum through it's normal URL you will be automatically redirected to allangels.proboards.com/index.cgi. All redirects are seamless and will direct you to the correct page you were attempting to access at the old URL.