If not too far from Lyon, I could try to help (France is CEST timezone now, CET in winter).
But I had the issue of USB device undetected when I plugged it in my previous desktop (the very first flashmasta units were working fine). That computer had an intel ICH10 USB chipset.
Then I went through a USB hub, plugged into the computer, and all was ok (I don't know if you've ever hear of the open Pandora handheld that had a similar issue. If you plugged an usb1 device on its usb2 port, it crashed the usb, but everything was fine when plugged through an usb2 hub into the very same port).
For win xp, I've no idea, as I've never tried the unit with it.
But I had the issue of USB device undetected when I plugged it in my previous desktop (the very first flashmasta units were working fine). That computer had an intel ICH10 USB chipset.
Then I went through a USB hub, plugged into the computer, and all was ok (I don't know if you've ever hear of the open Pandora handheld that had a similar issue. If you plugged an usb1 device on its usb2 port, it crashed the usb, but everything was fine when plugged through an usb2 hub into the very same port).
For win xp, I've no idea, as I've never tried the unit with it.