I am unable to download directly using USB cable, camera to PC with my A720IS. PC O/S is Windows XP Service Pk 2. USB cable and port are ok. When camera connected message on monitor "Device not recognized". Canon does not provide a driver but in camera manual say a driver is not required when using XP. Has anyone else had this problem and have a solution. Yes, I have a card reader that works but want to download direct. Thanks.

