unable to login after upgrading.

I just upgraded from 1.3.8, and I can't login to the admin site, and the forgot password link doesn't work. I followed the directions for changing the username, and password in php my admin. Now, when I login using admin,I get the same page I got when clicking forgot password, which is: WARNING: An Error occurred, please refresh the page and try again.

I checked the error log, and this is what I got:

[17-Jun-2012 13:56:42] PHP Fatal error: 1146:Table 'shoppingcart.notes_categories' doesn't exist :: select * FROM notes_categories ORDER BY notes_categories_name in /hermes/bosoraweb019/b2365/ipg.redsautorehabcom/includes/classes/db/mysql/query_factory.php on line 101

I need to get the site back up, and I can't make any sense of this.

I figured out where the problem is, and basically I installed version 1.5 in a new folder with a different database. My host uses mysqladmin, and it wouldn't let me merge my old database to the new one, so when I went live, I just changed over to the old database, but I lost some of the database items that I need. Here is the error I get when I try to import the new database into the old one:

MySQL said: Documentation
#1044 - Access denied for user 'shoppingcart'@'10.%' to database 'newzen'

I will keep trying to see if I can correct this myself.

I got it fixed. I switched back to the new database, and followed the directions here: http://www.zen-cart.com/content.php?144-how-can-i-do-a-database-backup-with-phpmyadmin