UBB.threads PHP Forum Software Community Forums Resources and Customizing Admin Zone Can't get into control panel

All,

I was upgrading a small forum to 7.5.3 as a precursor to upgrading our main forums to 7.5.3. I thought I was in the dir for the small forum, but was in the dir for the main forum (yes slap me now). I made some file permission changes and when I realized I was in the wrong forum I thought I reversed the file perms I made. Now I can't get into my control panel - when I bring up /forums/admin/login.php it just give me a blank screen.

I need some quick help.

thanks,

Wayne