visa library objekt reference not listed in VBA under WIN7

Hi Community!

I have a VBA Script using the VISA32.DLL.

The Script includes the "VISA.BAS" and an object reference to "Visa Typelib" is set, its works fine with WinXP. 

Now I am trying to get it working with WIN7 (32Bit).

I installed the same Package Ni-VISA_5.3_full.

"Visa32.dll" is in the expected folder ( Windows/system32/ ..) but the "Visa Typelib" is not listed in the VBA Objekt reference browser anymore.  

Under XP there are registry entries like these:

   [HKEY_CLASSES_ROOT\TypeLib\{39C32428-25DB-11D0-85B4-0020AF33DEAE}]
   [HKEY_CLASSES_ROOT\TypeLib\{39C32428-25DB-11D0-85B4-0020AF33DEAE}\3.1] @="VISA Library"
   [HKEY_CLASSES_ROOT\TypeLib\{39C32428-25DB-11D0-85B4-0020AF33DEAE}\3.1\0]
   [HKEY_CLASSES_ROOT\TypeLib\{39C32428-25DB-11D0-85B4-0020AF33DEAE}\3.1\0\win32] @="C:\\WINDOWS\\system32\\visa32.dll"
   [HKEY_CLASSES_ROOT\TypeLib\{39C32428-25DB-11D0-85B4-0020AF33DEAE}\3.1\FLAGS] ="0"
   [HKEY_CLASSES_ROOT\TypeLib\{39C32428-25DB-11D0-85B4-0020AF33DEAE}\3.1\HELPDIR] @="C:\\WINDOWS\\system32"

With WIN7 there are none of such entries.

Un-and reinstalling the Ni-Visa Stuff does not help.

Locking forward for an expert recovering me from running crazy :-)