Entered Wrong password, now can't map network drive

I worked on the problem some more and found a fix. I logged on to the server computer and changed the names of the accounts on the computer, then went back to the other computer and it finally said that it couldn't find the user name and let me enter a new one. Went back and change the account name back and now everything seems to be working.
You would think there would be an easier way to have windows forget a password!

Thanks for both of your help!

Go to "run"
type "credential" and choose "Manage Windows Credentials"
In there you can delete or amend the account for the PC you need to link to. If you delete it it will ask you for credentials next time you try to connect to it.

Regards :)

The credential trick solved it.