private messaging denied!

when i click 'My Inbox' i get a message saying:

Access denied
You are not authorized to access this page.

also, on this page (Submit Forum topic), there's a pink box under the "Submit Forum topic" title with this in it.

* warning: reset() [function.reset]: Passed variable is not an array or object in /home/tsumeaco/public_html/sites/all/modules/og_forum/og_forum.module on line 1142.
* warning: key() [function.key]: Passed variable is not an array or object in /home/tsumeaco/public_html/sites/all/modules/og_forum/og_forum.module on line 1143.
* warning: array_key_exists() [function.array-key-exists]: The first argument should be either a string or an integer in /home/tsumeaco/public_html/sites/all/modules/og_forum/og_forum.module on line 1144.

im using firefox 2 if that helps :D