new spam getting through

[Peter Ong]

Hey Mr. Steve, thanks for the plugins. I didn't thank you earlier.

So here's how the plugin is faring at my place:

1. It appears to be working fine:
[7443] dbg: config: read file /etc/mail/spamassassin/DecodeShortURLs.cf
[7443] dbg: plugin: loading Mail::SpamAssassin::Plugin::DecodeShortURLs from /etc/mail/spamassassin/DecodeShortURLs.pm
[7443] dbg: plugin: Mail::SpamAssassin::Plugin::DecodeShortURLs=HASH(0xacc6f30) implements 'parsed_metadata', priority -1

2. I still received spam, and it doesn't appear this was triggered at all:
[root at me]# grep -c SHORT_U mail20101204
0
[root at me]# grep -c SHORT_U mail20101205
0

I know those spams came through on these days through this server.

3. This is the spamassassin I'm running.
SpamAssassin version 3.2.5
  running on Perl version 5.8.8

4. cd /tmp/DecodeShortURLs
du -hs DecodeShortURLs.txt
0       DecodeShortURLs.txt

I don't know what I'm missing. Can somebody help?

p