I have recently done a complete new install of my windows/parallels partition on my MacBook.

Windows XP works fine

Rhino 4 SR9 works fine

Grasshopper doesn't.

Grasshopper AFAIK needs .net frame 2. Since I'm not too familiar with Windows (I work mostly on Mac OSX), I installed .NET FRAME 4, but it doesn't work.

Later on I installer .NET FRAME 2. Grasshopper doesn't work again, but this time I have also an error:

What should I do? Throw my MacBook+Windows XP out of my window(s) ?? :-)