[Dovecot] IMAP/Plain Text issue with Dovecot

I finally got Dovecot working pretty good I just have one small problem. I can't seem to log in via IMAP, now everything works great through POP but when I try to login via IMAP I get the following error:

"PLAIN authentication failed. None of the authentication methods supported by your IMAP server are supported this computer"

Anyone seen this before?