install problem error 404

Let me start of by saying I am beginner at using webhosting. I'm trying to install "v share" when I type the
command for it to run it gives me the error message
below the dotted line. I host with hostonnet, and I'm
using Cpanel. what am I doing wrong?

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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.

Additionally, a 404 Not Found error was encountered
while trying to use an ErrorDocument to handle the
request.
Apache/2.2.11 (Unix) mod_ssl/2.2.11
OpenSSL/0.9.8e-fips-rhel5 mod_auth_passthrough/2.1
mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at
beapornstar.net Port 80