Angry Lost IMAP Account

OK, just wondering if there is anyway of fixing this without resorting to a hard reset and reloading everything; here it goes:

I had configured an IMAP mail account and all was well in the world of email, and then all of a sudden the account was no longer visible under messaging. Hmmm, thought I, not all is well in the world of email. I tried recreating the account again, but receive the cryptic error message:

"That name is already assigned to another account. Enter a unique name and try again."

I can create another, differently mnamed account using the same settings which works without a hitch, but this "ghost account" is still there haunting and teasing me with the requirement of now having to use Liquid Mail 2 rahther than the much simpler Liquid Mail.

Any thoughts on how to fix this?