Error executing Batch SCCM 2007

Hi there,

I'm having problems to execute a batch file during a Software distribution.

I want to Install Adobe Acrobat X Standard with SCCM 2007.

Before the installation will start, a batch file is running with an reg query if Acrobat 9 is installed and if its installed the system will uninstall it.

If i run this batch locally, its working perfectly.

But if SCCM will execute them i get a error message:

------------------------------------

The program for advertisement "S0120067" failed ("S0100057" - "Uninstall Acrobat Standard 9.0"). A failure exit code of 1605 was returned.

------------------------------------

Here the really simple Batch:

------------------------------------

Reg Query HKEY_CLASSES_ROOT\Installer\Products\68AB67CA3301004FABE7000000000040
 if %errorlevel%==1 goto :end
 msiexec.exe /norestart /x {AC76BA86-1033-F400-BA7E-000000000004} /qn

:end

------------------------------------

Any ideas?