How to use subdomain as forum?

[solidlink]

I got another problem now it seems.... When I go to admincp, it seems to use the subdomain as part of the address and I cant access some custom mods and the login seems to have issue. of course the easier way would be to delete the subdomain etc...... but is there anyway to keep the subdomain and let everything else continue to work?

Example: I get to this webpage

http://forums.whysg.com//admincp/tin...rce_editor.htm

instead of

http://whysg.com/forums/admincp/tiny...rce_editor.htm