I've only ever accessed amiga formatted HD;s with win2K. I don't trust XP as far as I can throw a fullsize tower running it.
I find it unlikely however, that the drive can have been damaged just by attaching it, unless you had some unfortunate power spike or something else weird.
You say it was a 2.5 inch drive? How did you connect it? I know that 2.5 inch drives are typically powered through their IDE cable (44 lines, 4 of which are for power IIRC). If you had the cable inserted the wrong way somehow, is it possible you fed current through the wrong pins?
Then again, if it was recognised by windows, I guess that is not a possibility.
Sorry, this isn't helpful, is it?