HOG3PC 3.1.5, Windows7 and VMware Fusion

I have installed HogPC on a 32Bit copy of Windows 7 which is running via a virtual pc programme VMware Fusion on my Macbook Pro. It installs fine but will not open. I get an error window named Wholehog. The error message is "Unknown exception". I have tried with various versions of HogPC software but still get the same error.

Any clues on how to solve this?
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