Silverlight GPO install script keeps installing!

Hi,

I use this script on our domain to install Silverlight through GPO:
http://download.microsoft.com/download/7/8/d/78da8ec9-8801-42e5-89e5-3809386f1316/Silverlight%20Deployment%20Guide.doc

This works on all our systems BUT on x64 it will attempt to install every boot. x86 works great. Anyone have any ideas? (I've copied the script below for reference)

setlocal

REM *************************************************************************
REM Environment customization begins here. Modify variables below.
REM *************************************************************************

REM Set DeployServer to a network-accessible location containing the Silverlight installer
set DeployServer="\\Server\Silverlight"

REM Set InstallerName to the name of your copy of the Silverlight installer
set InstallerName=silverlight.exe

REM Set LogLocation to a central directory to collect log files.
Set LogLocation="\\Server\Silverlight\Logs"

REM *************************************************************************
REM Deployment code begins here. Do not modify anything below this line.
REM *************************************************************************

reg query HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Silverlight
if %errorlevel%==1 (goto DeploySilverlight) else (goto End)

REM If 1 returned, the product was not found. Run setup here.
:DeploySilverlight
%DeployServer%\%InstallerName%
echo %date% %time% Setup ended with error code %errorlevel%. >> %LogLocation%\%computername%.txt

REM If 0 or other was returned, the product was found or another error occurred. Do nothing.
:End

EndlocalStart Free Trial