(Mailscanner+spamassassin) not working

[padma at eis.iisc.ernet.in]

Mailscanner-4.40.11

SpamAssassin version 3.0.4
running on Perl version 5.8.0

F-PROT ANTIVIRUS
Program version: 4.5.4
Engine version: 3.16.6

All running on RedHat 9.0

Mailscanner seems to be not using spamassassin at all, even after i set 
the option in mailscanner.conf as

Use SpamAssassin=yes

should i install a spamass-milter separately for spamassassin to function 
with sendmail?????

The exact problem is : When i forward a genuine spam from some machine 
which has spamassassin running to a machine which has 
mailscanner+spamassasin running, it doesn't get tagged as spam. 
Mailscanner seems to be giving some spam score with character s, but that 
mail must get a high score in case mailscanner is successfully using 
spamassassin.


Regards
Padma