Elyaradine wrote:There's the possibility that you aren't using the right forum style for your version of phpBB3.
If you install an old style (usually built for RC5 or older) onto a newer (RC6 or newer) forum, then the style causes a number of problems including not being able to post, and not being able to log into your ACP.
If possible, change your skin into the default phpBB style (prosilver) and try logging in again. If this works, then delete the old style and look for an updated version of it. (Alternatively, spend ages and ages updating it yourself...)
yea i suffered from exactly what you are mentioning in that post when i first installed phpBB3. i just changed to a different theme.
to fix it i just deleted all of the forum files on my server and reinstalled phpBB3. but this time i made sure that the permissions in the admin panel allowed users to change the theme to prosilver if they wanted to while i installed the new theme, this way if i encountered the error again i could just switch to prosilver in the user control panel then i could change the forum default style then install a new one until i found one that worked
hope this post helped