SCCM 2007 - vbscript does not edit HKCU

Hi,

I need to modify the registry setting below:

KEY_CURRENT_USER\Control Panel\Desktop
SCRNSAVE.EXE
REG_SZ
"C:\Windows\System32\PhotoScreensaver.scr"

If I run the script manually, the registry setting is changed. If I run the script via an SCCM package, the registry key remains unchanged even though the command is executed. I get the same result with Windows 7 32 and 64-bit.

Is there a way to make this registry change succeed when I run the package?

Thanks,

Rob