Computer and KFU not recognizing kindle fire.

[androidalais]

I tried rooting my Kindle Fire with the KFU and while it was rooting, it stopped after it rebooted into recovery mode. It sat at the Please wait... line and stayed there so i shut it off and turned it back on and went to plug it into my computer but my computer doesn't recognize it as a storage device, or a device at all. My kindle knows its connected but the computer says there's nothing there. KFU doesn't see it either. I have FFF and TWRP and they both work but tibackup says no root and there's no superuser.