V5.1

It seems almost suddenly, without any code changes that I know of.

A request for a cgi file on our server is getting blocked suddenly:

http://www.hamsa-yoga.org/cgi-bin/test.pl

Permissions are 755 as recommended for the real script I'm trying to access (the above is a blank file).

I seem to remember having to adjust htaccess somewhere, some long time ago to avoid a similar problem. Any ideas?