SpamAssassin-Still Having a LOT of Spam

Hi, I am using KMAIL on SuSE10.1 and still getting sick each day of big amount of spam. I have created special mailbox in KMail (in mbox format), where I am collecting all junk. Then after some time, I am run: sa-learn --spam --sync --showdots --mbox /home/andrei/.kde/share/apps/kmail/mail/zzz-DefineSpam The spam database seem to be updated. But later I have the same junk messages NOT filtered by Spamassassin. Anyone have a clue how to remedy situation. I am using Apple Mail at work (with the same incomming mail addresses), and the number of spam at Apple Mail left in inbox is definitely lower than in KMail. Thanks in advance for any suggestion(s)