Are you sure that you have properly configured PAM for IMAP on the Linux system? I know that there is a specific PAM configuration that has to be done for IMAP (something about an /etc/pam.d/imap file) but I don't know the details.
I know that lots of people are using PAM with IMAP successfully, and getting the right PAM configuration file set up is the most common hurdle. -- Mark -- http://staff.washington.edu/mrc Science does not emerge from voting, party politics, or public debate. Si vis pacem, para bellum.
