Mailscanner and centos 6 trouble

[Lic. Jorge P. Boland]

hi... i have some troubles with MailScanner 4.84.3, clamd 0.97.2, 
SpamAssassin  3.3.1 and Centos 6 (postfix)

The configuration was done with the follow tuto 
http://www.linuxmail.info/mail-server-setup-centos-6/

The error in message log is: "MailScanner: Process did not exit 
cleanly, returned 255 with signal 0"

and in the maillog log: "MailScanner E-Mail Virus Scanner version 
4.84.3 starting..."

Can anybody help me ?.

Thanks in advance and sorry for my bad english.