I found the following in an old post. It's talking about Vista, but Win7 may be the same problem :
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Most likely, some of the supporting programs are not installing correctly.
Please try this:
If you are running Vista SP1 or later, please run the following from the folder where you unzipped the file:
· vcredist_x86.exe
· xnafx20_redist.msi
· direct\DXSetup.exe
if you are running Vista RTM, install the XNA framework 3.5 from Microsoft located at:
http://www.microsoft.com/downloads/d...displaylang=en
and then run the same files under Vista RTM above.