mailscanner won't scan

[Serhan Sevim]

Well,first of all I'm not new to mailscanner.However, it's been 4 years
since the last time I used it for some other company. Since then, things
have been changed I guess. I successfully, installed and started
Mailscanner, and the logs shows as: 

Dec 13 19:28:16 server MailScanner[6081]: MailScanner E-Mail Virus Scanner
version 4.65.3 starting... 
Dec 13 19:28:16 server MailScanner[6081]: Read 797 hostnames from the
phishing whitelist 
Dec 13 19:28:16 server MailScanner[6081]: Read 4147 hostnames from the
phishing blacklist 
Dec 13 19:28:16 server MailScanner[6081]: SpamAssassin temporary working
directory is /tmp 
Dec 13 19:28:16 server MailScanner[6081]: Using SpamAssassin results cache 
Dec 13 19:28:16 server MailScanner[6081]: Connected to SpamAssassin cache
database 
Dec 13 19:28:16 server MailScanner[6081]: Enabling SpamAssassin
auto-whitelist functionality... 
Dec 13 19:28:17 server MailScanner[6081]: I have found clamavmodule scanners
installed, and will use them all by default. 
Dec 13 19:28:18 server MailScanner[6081]: Using locktype = flock

Times 5 for each MailScanner process. I've checked everything working ok,
emails are accepted ok, except one thing.. well, It seems like MailScanner
doesn't even notice the emails are being received. It doesn't scan it, it
doesn't tag it, no virus scans, no nothing.. Emails are slipping thru
without even MailScanner knows it. Email server is running on the same
server as MailScanner, so it can't be a by-pass problem either.
It's currently running on default spamassassin and clamav.
Any ideas?
Thanks in advance,
Serhan.