OpenwWebmail

Instalei o OpenwWebmail no Slackware 10.1, mas quando tento acessar o Openwebmail aparece a mensagem abaixo mensagem.

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, [email protected] 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.

Apache/1.3.33 Server at mauro.gelsimauro.com.br Port 80

No meu /var/log/apache/error_log aparece a seguinte mensagem

YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!
FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!

Alguém sabe qual o problema, quem pode me ajudar??

Agradeço qualquer ajuda.