Converting a VirtualPC 2007 VHD - problem

Hi, I have tried to convert a VPC 2007 VHD of a win2000 VM and it seems to convert OK with no errors.

But, as soon as I start the converted vm in VMPlayer I get an error message along the lines of "error in first line," or "error in line 1"

Sorry, I forgot to write it down and I am now at work.

Is there  anything I can do to fix the conversion?

Thanks