Can't use super user account I have a Drupal 6 installation, and wanted to make some changes for the client. However, this fails, because as soon as I log in with the super user account it says: 


  Access Denied: You don't have sufficient permissions to access this page


So I can't even log in using the super user account (uid 1). The password is already reset several times. The cache tables and session tables are emptied. What can I do?
I hada look into my watchdog table. It said the sessions table was corrupted and needed to be repaired. So I did it, and after that I could login with the super user again. Thanks everybody for helping out, but it was something different this time.