saslauthd against courier-imap server results in "Unexpected response from remote authentication server"

[Oguz Yilmaz]

My test was with RHEL 5.4 saslauthd 2.1.22-5.el5 against Courier-IMAP
server 3.0.8.

Apr 21 10:36:47 2010 saslauthd[23061]: auth_rimap: unexpected response to auth
request: MESPACE THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE ACL
ACL2=UNION STARTTLS] Courier-IMAP ready. Copyright 1998-2005 Double Precision,
Inc.  See COPYING for distribution information.

Apr 21 10:36:47 2010 saslauthd[23061]: do_auth         : auth failure:
[user=test] [service=smtp] [realm=] [mech=rimap] [reason=[ALERT] Unexpected
response from remote authentication server]

Another point: Another server with RHEL 3.4 with cyrus-sasl-2.1.15-10 is
working without any error.

ANy help will be appreciated.

Oguz.