openwebmail not work

[Nilton Jose Rizzo]

Hi folks,

   I have a box running FreeBSD 8.2 stable with apache
     Server version: Apache/2.2.18 (FreeBSD)
     Server built:   May 22 2011 21:23:34
   and perl 5.12.3 and owm version 2.53

my owm.conf

domainnames             XXXX.com.br
auth_module             auth_unix.pl
mailspooldir            /var/mail
#ow_cgidir              /usr/local/www/cgi-bin/openwebmail
ow_cgidir               /home2/www/XXXX.com.br/cgi-bin/openwebmail
ow_cgiurl               /cgi-bin/openwebmail
#ow_htmldir             /usr/local/www/data/openwebmail
ow_htmldir              /home2/www/XXXX.com.br/openwebmail
ow_htmlurl              /openwebmail
logfile                 /var/log/openwebmail.log

enable_viruscheck       no
enable_spamcheck        no
enable_learnspam        no

default_iconset         Default
default_fscharset       none

<default_signature>
-- 
Open WebMail Project (http://openwebmail.org)
</default_signature>
enable_saprefs yes
spamcheck_source_allowed       all
viruscheck_source_allowed      all

I have some virtual domain but the real domains was configured
in owm.conf

I take this mesage on browser:

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to
complete your request.

Please contact the server administrator, webmaster at XXXX.com.br and inform them
of the time the error occurred, and anything you might have done that may have
caused the error.

More information about this error may be available in the server error log.

On /var/log/owm.log   -->>  nothing
on /var/log/XXXX.error.log -->>
[Sun May 29 00:32:50 2011] [error] [client 186.221.20.26] Premature end of
script headers: openwebmail.pl, referer: http://www.XXXX.com.br/index.php
[Sun May 29 00:32:55 2011] [error] [client 186.221.20.26] Premature end of
script headers: openwebmail.pl, referer: http://www.XXXX.com.br/index.php

on /var/log/messages.log  -->>  Nothing

I just read the FAQ and search on mail list  but nothing resolv my problem
someone can help me?

This is a new instalation, I use the owm for long time ago, but now nothing
work correct, mavbe I forget some things or some mistake when I type the
config files ....

TIA, 
--
Nilton José Rizzo
MSC. Eng. Nuclear
Eng. Eletronico
Laboratorio de Instrumentacao Nuclear