But I did. I made one with url http://subdomain/cgi-bin/

but it doesn't work. I get Forbidden
You don't have permission to access /cgi-bin/ on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
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Apache/1.3.27 Server at blackmountains.pcplayground.com Port 80

Shouldn't his work?