[_ck_]

The cookies are a different problem, you have to set the cookies to use the root / and not a sub-folder.

See if it allows you into

http://absolute-truth.net/forums/bb-admin/options-general.php

and/or

http://absolute-truth.net/blog/wp-content/plugins/bbpress/bb-admin/options-general.php

and change the bbPress address (URL)