Shutdown script deployed by GP not running

We have a GPO that has a shutdown script that runs on our XP machines, but does not run on our win7 machines.

Our DCs run Server2003.

The script is simply a shortcut to an hta file on the hard drive of the clients machines. I have checked several win7 machines and the hta files are present in the correct location.

Then shuting down an XP machine, a window appears with information for users and closes by itself after 20 seconds or closes when a user clicks on it. When shutting down a win7 machine, the window does not appear.

Does anyone know why the scipt is not running on win7 machines?

It's a permission issue in Windows 7. You need to run it via CMD as administrator. See how here:
Scriptomatic.hta not working in Windows 7