[Dovecot] a newbie question.

[Pahlevanzadeh Mohsen]

Hi,
I'm a newbie.Sorry for my question.
I have RH9 & downloaded rpm of dovecot for RH9.
I installed it:
rpm -ivh nameOfthatrpm
& when i ran 
#service dovecot start ,I recieved following lines:
Starting IMAP daemon (dovecot): Fatal: Can't use SSL
certificate /usr/share/ssl/certs/dovecot.pem: No such
file  or directory                                    
                       [FAILED]


Please guide me........

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