[exim] Problem with spam assassin and exim

Hello,

I am running the Debain etech "testing/unstable" release with "Linux
version 2.6.16-2-k7 (Debian 2.6.16-17) (waldi@???) (gcc version
4.0.4 20060630 (prerelease) (Debian 4.0.3-4)) #1 Sat Jul 15 23:05:41 UTC
2006" kernel. The exim version is

ii  exim4          4.63-17        metapackage to ease exim MTA (v4)
installati
ii  exim4-base     4.63-17        support files for all exim MTA (v4)
packages
ii  exim4-config   4.50-8sarge2   configuration for the exim MTA (v4)
ii  exim4-daemon-h 4.63-17        exim MTA (v4) daemon with extended
features,
ii  sa-exim        4.2.1-7        Use spamAssassin at SMTP time with the Exim
ii  spamassassin   3.1.7-2        Perl-based spam filter using text analysis

My issue is that the spamassassin is not being consulted by exim4
inbetween. I can see that the spamassassin is running from the output of
"netstat -na", but exim4 does not consult spamassassin for filtering. Can
anybody please help me? Thanks in advance.

Regards,
Biju Abraham N.