Ok, I've had my databases up and running for over a month now. But it seems like occasionally the UID/Passwords "hiccup". A brand new user tries to log in, and it comes up with an error. I check it and it's not user error. Also, just had a user try to login, who's been able to login before, and couldn't this time. Is there a max number of users suggested? What could be the problem that's causing it to error? Please help. It's a very busy site.

There may be an issue with 'flock' in the db.cgi file - there appears to be a missing 'close PASS;' which would leave the file lock on.

Go see my post in DBMan Customisation "Open/Close Issue'