XPR 6350 won't update on windows XP

Trying to do a firmware update on a few of our portables. I've got an old laptop running win XP that we utilize for some of this. I can read, write and clone radios just fine, but when I go to update, I get a message telling me I don't have the correct cable or something to that effect. Occasionally it will also try to find a CH FLASHZAP driver (and fail).



Meanwhile, I can update just fine with my windows 7 laptop.



Same version of CPS 9.0 on both computers. Firmware R01.08.32 -> R01.11.21



What gives?