OK.. I have a strange issue.

Upgrading a customers site. 1.3.9 to 1.5.5e
Backed up everything.
Doing the upgrade on the site, all is ok until I get to the database upgrade portion.

I get the following message:
There are some problems


Could not verify the Admin Credentials you provided.

To authorize the database upgrade, you must enter an admin username and password with SuperUser (ie: unrestricted) permissions in your store.
This will be the username and password you use to log in to the Admin area of your store.
(It is NOT your FTP password, and is not your hosting control panel password. Nobody knows this password except you or your storeowner. You can not get it from your hosting company.)
If you are locked out of your store and do not know any valid admin passwords and cannot log in to your store Admin page, then you can do an aggressive reset of the password by following the instructions in this article: http://www.zen-cart.com/content.php?...admin-password.
I know the password, but it doesnt work.
I went to the above URL, did the fix it suggested, doesnt work. (I went to phpmyadmin and did the admin pass change)
I cant log into the Admin panel because I get the error:
database upgrade required. please run the 1.3.9-to-1.5.0 upgrade via zc_install
I have checked and rechecked everything. The configure.php file is good and has all the table prefixes, etc.
What am I missing?

Thanks!
Mark