Sieve vacation rule not working..

[Joseph Silverman]

All other sieve stuff works fine.

Here is the sendmail.mc that is relevant:
(Sendmail 8.13.4/8.13.4)

define(`_FFR_MILTER', `true')dnl
INPUT_MAIL_FILTER(`Synonym', `S=local:/var/run/synonym/synonym.sock,  
T=C:10m;S:1s;R:1s;E:5m')dnl
define(`confLOCAL_MAILER',`cyrusv2')dnl
define(`CYRUSV2_MAILER_ARGS',`FILE /var/lib/imap/socket/lmtp')dnl
MAILER(cyrusv2)dnl

And here is the contents (edited) of my /etc/imapd.conf:
(Cyrus IMAP4 v2.2.12-Mandriva-RPM-2.2.12-15mdk)

configdirectory: /var/lib/imap
partition-default: /var/spool/imap
admins: cyrus
allowanonymouslogin: no
altnamespace: true
unixhierarchysep: true
sievedir: /var/lib/imap/sieve
sendmail: /usr/sbin/sendmail.sendmail
hashimapspool: true
allowplaintext: 1
sasl_pwcheck_method: saslauthd
sasl_mech_list: PLAIN LOGIN

Can anyone help me fix this setup?  Tell me where to look or at least  
how to debug it?

THANKS - Yossie