Moving vbulletin to a new host - the process?

[ATVTorture]

We're moving our forum to a new host with a new domain name for various reasons. We're using a different domain name just so we can get everything moved over and tested ahead of time without having to bring our forum down. When all is working well with a backup of the database, we'll lock the existing forum down, get a fresh dump of our databases and test again. Once all is well, we'll point the old domain name to the new domain name.

Currently, I have all site files and databases imported on the new domain.

I THINK I have all of the config files for vbulletin and other add-ons pointing correctly to the new host. However, when I tried to load the site up, I get a blank page with a database error on it. It just says Database error: the datbase encountered a problem and then the usual other jargan about trying to refresh or contact the system admin. Does anyone have an idea of what I could have missed or if there's something else I must do to make the site load up?

Thanks!
Buster