gacutil is not a valid win32 application?

I registered Mono.WebServer.dll in the GAC with:

C:\Program Files\Microsoft Vi开发者_如何学编程sual Studio 8\SDK\v2.0\Bin\gacutil.exe

Then I wanted to install an additional assembly in the GAC and I got:

gacutil is not a valid win32 application.

I used the same gacutil both times... I restarted and the problem persists.

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Gacutil is bundled with .Net SDK, not with visual studio. Maybe you should try to re install .Net SDK if it needs to and load gacutil from this path : C:\Program Files\Microsoft SDKs\Windows\v6.0A\Bin (make sure the version number matches your system)