Well, Being a counterfit, I would deep six it and get another. Save yourself the frustration
One last thought - did you do the quick format in xp, or the deep format ?
try deep format if you didn't before.
Tried both. The deep format show progress (green bar) but replies "Windows cannot complete format." I then tried DOS again and it identifies the file system on the stick as "RAW"
Water here she comes I think.
Thanks for your efforts