I have several digital cameras akll using XD cards and normally download using a DAZZLE card reader with no problems. I recently bought several new XD cards but the card reader does not recognise them and the only way to download is via the camera USB connection. All of my old cards still download OK and work in all of the cameras with no problem.
Are they very large cards I have a card reader built in to my laptop and it will read all of my older cards but I have bought a couple of 2gig cards recently for my wifes and daughters camera's (SD) and it will not read them only the one on my daughters photo printer will read them!!!