Can't get PHP to run on ISS virtual directory.

[Paul]

I can't get PHP to run on ISS virtual directory. PHP runs fine if run from
the www root, but if I create a virtual directory to another local drive and
put the PHP files in there I cannot run them. If I put a normal html file
in the virtual directory that works fine.

I have checked the app mappings and PHP is in there and mapped, any ideas?