I used php v 5.1.4 and the latest Xitami version.
1st change, use 'C:\php\php-win.exe' (in Windows OS) instead of 'C:\php\php-cgi.exe'
2nd change, you must click on the save button after you have changed the filters page and then again in the standarn configuration page.
finally, restart the server by going to the windows Gui interface (right click on the Xitami symbol in the system tray and choose properties) and click suspend (so the background for the 'X' goes red) then click start again.
hope this helps anyone with problems