I purchased these two products from your site in a bundle with a USB cable about 2 months ago and I've recently been having problems with them. Whenever I try to connect them to any computer, the computer doesn't recognize that they are there. They can't be found when I attempt to send bit files to them either. However, they do seem to receive power as the LED's light up. I would like to know if there is a quick fix for this or what else I can do, thanks.