Error 500 Internal Server

[lucho2000]

Buen dia
Tengo un servidor centos con Apache:
Me aparece error 500 Internal Server
Ademas dice:
Additionally , a 404 Not found error was encountered while trying to use an ErrorDocument to handle the request.
<address>Apache/2.2.23(Unix)mod_ssl/2.2.23 OpenSSL/1.0.0-fips mod_auth_passthroug/2.1 mod bwlimited/1.4 FrontPage /5.0.2.2635 </addres>

Agradezco a quien pueda ayudarme...