spamassassin not tagging spam

Hello,

I am using spamassassin 2.63 and lately, spam has not been tagged as
spam as it should be. Looking in the header of the spam, i see that
spamassassin is scoring it and the score is high enough for it to be
labeled as spam, but the spam is still getting through with an
unmodified subject. Here is part of a spam header I get:

Received: from ydcxzh@vlmail.com by icesports.com by uid 502 with
qmail-scanner-1.22
(clamdscan: 0.72. spamassassin: 2.63.
Clear:RC:0(61.51.121.192):SA:1(24.6/5.0):.
Processed in 4.939272 secs); 23 Jul 2004 17:12:52 -0000
X-Spam-Status: Yes, hits=24.6 required=5.0
X-Spam-Level: ++++++++++++++++++++++++

so i see spamassassin is scoring the message _well_ above the hits
required.

Here is what my spamassassin local.cf looks like, minus special
blacklist and whitelist stuff:

# This is the right place to customize your installation of
SpamAssassin.
#
# See 'perldoc Mail::SpamAssassin::Conf' for details of what can be
# tweaked.
#
################################################## ######################
###
#
#

required_hits 5.0

rewrite_subject 1

subject_tag *****POSSIBLE SPAM*****

report_safe 0

use_terse_report 0

skip_rbl_checks 0
use_razor2 1
use_dcc 1
dcc_timeout 10
use_pyzor 1
ok_languages en fr
ok_locales en

timelog_path /var/log/spamassassin

# Customized Rules
score MIME_HTML_ONLY 3.000
score HTML_IMAGE_ONLY 3.000
score DATE_MISSING 3.000
score RCVD_IN_BL_SPAMCOP_NET 3.000
score USERNAME_IN_SUBJECT 8.500
score ADMIN_IN_SUBJECT 8.500


anyone know what i am doing wrong here?