kolab problem (imap TLS failed)

[kemas]

hi all,

last month I installed kolab 2.0.3 in CentOS 4.0 for testing purposes, and
it runs quite well.

now I'm trying to build mail server with kolab on CentOS 4.3 but I get this
error in imap log:

May 22 18:23:31 webmail.ramayana.co.id <debug> pop3s[26129]: accepted
connection
May 22 18:23:31 webmail.ramayana.co.id <notice> pop3s[26129]: TLS server
engine: cannot load CA data
May 22 18:23:31 webmail.ramayana.co.id <error> pop3s[26129]: unable to get
private key from '/kolab/etc/kolab/key.pem'
May 22 18:23:31 webmail.ramayana.co.id <error> pop3s[26129]: TLS server
engine: cannot load cert/key data
May 22 18:23:31 webmail.ramayana.co.id <error> pop3s[26129]: [pop3d] error
initializing TLS
May 22 18:23:31 webmail.ramayana.co.id <error> pop3s[26129]: Fatal error:
tls_init() failed

can anyone pointing out my mistakes?

thanks
kemas