I have loaded a simple web cache page to a USB key. how is it possible for this USB key to be read by the 751G-2HnD. I have tried various options but I always have to format the USB key in the 751G-2HnD but then the usb key cannot be read by my PC unless I format it on the PC. I have tried the same with an SD card on the Rb450G and I get the same result. what am i missing ?.