Unable to log into UO

[Diesalot]

Hello,
Im having an issue trying to log in to the UO game. I created a main account and then yesterday thought it would be fun to start an alt account. When i attempt to log in to my main i get a "Your account credentials are invalid. Check your user ID and password and try again". I can still log into the alt account.

Anything you can do to help me out?

Diesalot