DOM strange behaviour

I found this:

On the same DOM I tryed to copy a post-FBA image of a SP2 configuration and
started it: no problems; all runs well.
then I tryed to copy the post-FBA image of a SP2 FP2007 configuration and it
was not possible to start it just found a blue screen with an IRQL NOT EQUAL
OR LESS THAN error (as in my previous post)

does anyone know where is the problem?

Both the configurations run over a common ide hard disk.

Thanks
Max