hello
I've downloaded your bad_link plugin, and checked the upload & permissions.

when I call http://www.ridesworld.com/cgi-bin/meo/bad_link.cgi
it works fine, the standard error template will be loaded.
Now I do
http://www.ridesworld.com/cgi-bin/meo/bad_link.cgi?ID=1
I get an Internal server Error.
I checked the permission of the template bad_link.html
this was 777, but must be 666
although it gives the error.
the admin path in bad_link.cgi is correct.

I have no idea what's going wrong, check it yourself, I have 2 links in the database for test.