To even get a value to appear in path_info if it is working you need to add something at the end of the url.
Like I stated in the post using the test file above or in your PM I responded to.
When using the control panel for php info you have to add a trailing path to the url like bella/info after phpinfo.php
Example
http://www.mydomain.com/forums/admin/phpinfo.php
path_info will have no value
http://www.mydomain.com/forums/admin/phpinfo.php/bella/info
will have the value bella/info

So in phpinfo search for something that has that value of bella/info
It might be some other Variable besides path_info

Blue Man Group
There is no such thing as stupid questions. Just stupid answers