Ok followed your instructions and this simply does not work.
Gives this error when I try to log in
Sorry this doesn't look like a WHMCS site at [http://www.2001web.com/support/] Make sure your WHMCS Integration settings are pointing to the correct URL and that the WHMCS site is set for the Portal template in Setup | General.
Visit that link and you will see it IS my whmcs installation.
I even re-installed the portal theme fresh...no joy.