That sort of sounds like the computer is powering off the USB port or just a bad USB card. Have you tried a different cable and UsB port? Perhaps try it on a different computer altogether. If it still has issues, then it is likely the uR itself.
That sort of sounds like the computer is powering off the USB port or just a bad USB card. Have you tried a different cable and UsB port? Perhaps try it on a different computer altogether. If it still has issues, then it is likely the uR itself.