If the counter  does not work, please check for owner and permissions
of the file "webcluster.cnt" in the cgi-bin directory.
Your apache needs write permissions to this file.

If the file does not exist please check if apache has create permission in
this directory or create it manually by a "touch webcluster.cnt" and adjust
permissions to 6xx with the correct owner of the apache server.

In my case it looks like this:

-rw-r--r-- wwwrun www   5 Feb 24  11:12 webcluster.cnt

You can change the path in the script, but take care to stay in the apache
directory tree!
Depending on the apache setup it is not possible to use files outsite
the apache directory tree defined by it's root (something like /tmp will
not work in usual setups !).