Hmmm... I've never been unfortunate enough to see that very technical error. But I would guess that it would be a good idea to make sure your PC has the the latest version of ActiveSync (a free download from Microsoft). You don't mention what type of Pocket PC or smartphone this is, but all the ones made in the past 3 years or so have used an ARM family CPU. So if the error message you've pasted is on target, you might have to look for a folder called ARM in the desktop installation mentioned in 2.
-------------------- Lisa Gade Editor in Chief, MobileTechReview