For some reason, the logout feature on my board isn't working... it just redirects you back to the original page...
First, log into your admin control panel and check the cookie settings so that they are unique to your domain. Then, clear the cookies for your site from your web browser, and then you can log out, and then continue to log back in and it should work fine from there on out.
[wiki]Cookies#MyBB_Cookie_Settings[/wiki]