That's ok, too.
You can try to compile SpamAssassin yourself on your system - maybe your system doesn't like the one that comes with ISPConfig. This is how you do it:
Code:
tar xvfz Mail-SpamAssassin-3.1.0.tar.gz
cd Mail-SpamAssassin-3.1.0
perl Makefile.PL PREFIX=/home/admispconfig/ispconfig/tools/spamassassin/usr SYSCONFDIR=/home/admispconfig/ispconfig/tools/spamassassin/etc
make
make install