Checkoutscript.php don't work

[Serverweb]

Hi

i try and try again but no solution

I've 3.6.1 Stable

i would like modify EMAIL ORDER CHECKOUT for admin

 

I try to install http://forum.whmcs.com/showthread.php?t=4435

I try to read a lot of thread but i don't find solution

 

How to modify this email?

with or without checkoutscript.php, with or without check "Run Script on CheckOut" i receive ever the same email with:

WHMCS New Order Notification

 

THANKS