Score modifications seem to be ignored?

[Steve Weigold]

In watching my logs on my new gateway, I noticed a couple of rules that 
I wanted to have a higher effect on the SpamAssassin score.  I modified 
them in spam.assassin.prefs.conf (as below) and restarted MailScanner, 
but the change doesn't seem to be recognized.

score LOTS_OF_MONEY 2
score URIBL_DBL_SPAM 3.5

Am I missing something?

Steve