Posted by:
c2dan
(---.15-1.cable.virginmedia.com)
Sounds like the user you're using to login to phpmyadmin doesnt have sufficient privileges to be able to do the action you're tying to do.
You should login to phpmyadmin using the root user. You then need to click the privileges tab find the user you're having problems with and click the Edit Privileges icon to the right of the user.
You should make sure all checkboxes are checked in the Data and Structure categories. To apply changes click the Go button to the right of the screen.
Now log into phpmyadmin using the user that you had issues with. You should now be able to manage your tables/databases.