[bincimap] Can't do plain text authentication

[Scott G. Carpenter]

I installed bincimap on a RH 7.3 server from the RPM.
When I try to test it, I get a client error saying Plain text authentication
is not allowed by the server. I have the " allow plain auth in non ssl =
"yes" " in bincimap.conf and /bin/checkpassword is installed (and works with
the existing imap server).
What am I missing?