timsieved : GSSAPI Error: Miscellaneous failure (No credentia

[Prentice Bisbal]

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I'm just setting up my first Cyrus IMAP server, and I've got a few 
questions. I've already read all the documentation and the O'Reilly 
book. Please forgive me if this question has already been asked/answered 
on this list.

I'm trying to connect unsuccessfully to timsieved using installsieve:

/usr/local/cyrus/bin/sieveshell --user=cyrus --auth=cyrus pdb-pc-9
connecting to pdb-pc-9
Please enter your password:
Please enter your password:
Bad protocol from MANAGESIEVE server: lost connection

The resulting entries in /var/log/messages:
-------------------------------------------
Nov 26 16:39:44 pdb-pc-9 perl: GSSAPI Error: Miscellaneous failure (No 
credentials cache found)
Nov 26 16:39:52 pdb-pc-9 timsieved[6227]: attempting server step after 
doneflag
Nov 26 16:39:52 pdb-pc-9 master[844]: process 6227 exited, signaled to 
death by 11

The resulting entries in /var/log/imapd.log:
-----------------------------------------
Nov 26 16:39:44 pdb-pc-9 master[6227]: about to exec 
/usr/local/cyrus-imapd-2.1.15/bin/timsieved
Nov 26 16:39:44 pdb-pc-9 sieve[6227]: executed
Nov 26 16:39:44 pdb-pc-9 sieve[6227]: accepted connection
Nov 26 16:39:52 pdb-pc-9 master[844]: process 6227 exited, signaled to 
death by 11

Doesn't GSSAPI indicate this is a kerberos problem? That shouldn't be, 
because I'm not using kerberos and even configured cyrus at comile time 
not to user kerberos:

./configure --prefix=/usr/local/cyrus-imapd-2.1.15 --enable-netscapehack 
--with-auth=unix --with-cyrus-prefix=/usr/local/cyrus-imapd-2.1.15 
--without-krb

For what it's worth, here my /etc/imapd.conf file:

configdirectory: /var/imap
partition-default: /var/spool/imap
admins: cyrus
sasl_pwcheck_method: auxprop
imapidresponse: no
altnamespace: true
tls_sieve_require_cert: no
tls_cert_file: /etc/pdb-pc-9.rutgers.edu.pem
tls_key_file: /etc/pdb-pc-9.rutgers.edu.pem

Any and all help will be greatly appreciated. Have a great Thanksgiving, 
too!

Prentice