There is definitely something unique to xoasis setup or how the cgi-bin is working. From what I'm seeing I think they have mapped page not found errors (404's) to redirect to their main page instead of displaying a 404 error. I know if you now try joodl_e's cp.html address above it redirects to the xoasis homepage. I think he/she has removed their UBB files and so instead of a file not found error it redirects to xoasis' main page.
You'll definitely need to talk to them about running scripts to see if there is anything special to do. One thing to check is if they use cgiwrap, thus calling a file from your cgi-bin would be typed as follows:
Dougdarksaber.hispeed.comOne Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them
In the Land of Mordor where the Shadows lie.
--J.R.R. Tolkien, The Lord of the Rings