Well, I have some bad news for you. Well, Digidesign does, really, I'm just the messenger (and please don't shoot the messenger ).
Please read the
Mbox2 Pro compatibility page carefully. Your bad news is located there.
Specifically:
Quote:
Please Note: Models that offer Intel Core 2 Duo laptop processors (codename Merom) are currently not officially supported or qualified with Digidesign products. Currently only the Intel Core 2 Duo desktop processors (codename Conroe) have been qualified.
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and
Quote:
Not Supported — Known Incompatibility
The Dell Precision M65 and M90 are Incompatible with Digidesign FireWire Peripherals
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I couldn't really tell the model number from the sandra post, and I don't think that either the m65 or the m90 come with the T7200 (I think they are both T7600), but I would imagine a similar model Dell might use similar parts, and contain the same compatibility problem. (which is why it works on your wife's machine and not yours)
So, it's not a file, its hardware related. Your only solution is to use it on a different computer, I'm afraid.