Errors running php.exe

[tmac]

Trying to get cacti running on XP using IIS. When I run php.exe c:\inetpub\wwwroot\cacti\cmd.php I immediately get a "< was unexpected at this time." warning and then a bunch of perl errors for fopen, fclose and fwrites saying failed to open stream. Do I have a variable or path missing or screwed up?

Thanks.