If it was a problem of the U-Disk not making proper contact with the G6 cart, a drive letter would still be assigned and show up in My Computer, but you'd get the message saying "Please insert a disk in drive x" when you try to access it. That's the message that the original poster in this thread was getting, but Prince Medion is not the orignal poster and his problem seems to be something different. He gets no new drive showing up in My Computer at all, whihc I think is probbaly a Windows related problem, not hardware.
In fact, I've had this problem with some USB drive device before, though I can't actually remember how I solved it. You should be able to research the problem with Google, though, since it's not specifically G6 related. Other than that, my advice would be first of all if you haven't already, try uninstalling the drivers manually, reboot your PC and then stick the U-Disk back in and see if it detects it right the second time. If that doesn't work try looking at your device manager in Windows and see if everything is there, a USB Mass Storage device shows up three times: once as a "USB Mass Storage Device," second as a "USB Disk" and third as a regular disk drive along side your HD. If it shows up as a disk drive (not just a USB Mass Storage Device) I would check the settings tab there and see if a drive letter is being assigned. You may want to try reserving a drive letter for it in that same tab and then removing and re-inserting the U-Disk. If none of that works, then hit up Google. If absolutely nothing works, then yeah, it could still be a hardware problem, I suppose, but I think that's the least likely option in this case.
...word is bondage...