I plugged my Memorex 512MB thumbdrive into the USB port in my new wired ultra-thin keyboard and I got this message... "The USB device cannot operate because it needs more power than is available. To correct this problem you can: 1) Plug the device into an electrical outlet if it has a power cord. 2) Unplug the device and plug it into another USB port on your computer or other device that is plugged into a power cord." Other things (like my digital camera) work fine when plugged in to USB port. Any reasons as to why my simple thumbrive does not?