IFF Editor Beta9 doesn't work for me

Hello !

I'm on Vista 64 bits.
I tried IFF Editor Beta9, but it doesn't work.
I followed the video tutorial.
So I put the iff file in bin, and I click on "Decompress". The black window appears and disappears really quickly, and no new files appears. So it doesn't work when I want to open it in the editor.

I tried to install framework 2.0, but on Vista, you have it automatically.
The file "dotnetfx.exe" tell me that it can't be installed on 64 bits sytem. So I downlaoded 64 bits version, and it told me it is already installed on my computer.

So, what can I do ??

Thanks in advance.

yeah me too!