I just copied my .bin from the mbed online IDE onto my FRDM-K64F, and this time it did not come up as a COM port in the Windows Device Manager. So I reset it, and that didn't help. Then I unplugged it and reconnected it, and windows just tells me "USB Device Not Recognized". My code is running because the RGB LED is doing what it's supposed to do. Can anyone tell me how to fix the problem?