Most likely, the script the form is submitting to hasn't been configured as a CGI or any other server-parsed file type.

The Apache FAQ offers more insight, but a fix could be as simple as giving your CGI a certain extension (.cgi and .pl are common), placing it in a specific directory (~/public_html/cgi-bin/), or enabling CGIs with an .htaccess file like ...

Options ExecCGI
AddType cgi-script .cgi
AddType cgi-script .pl
[download]

If none of these things work, your best bet would be to ask the server's administrator for assistance; it could well be they don't want you running CGIs and have configured Apache accordingly.

    --k.