This is really starting to irritate me. I had once connected my Xoom to my computer when I first got it, and it recognized it fine and I transferred files. Now when I try to reconnect it, it won't recognize my Xoom. Did some research, downloaded Moto's driver from their website, restarted, and still nothing. What is wrong with this device? Oh, and I'm running Windows 7 64 bit. Please help!