Fastboot interface, "This device cannot start" problem

[kitkit1795]

I rooted the tablet with Unlock Root but now I'm stuck where I can't use Fastboot. I'd like to put CWM Recovery and Cyanogen Mod 9 on it.

Edit: NVM I was using a usb hub and not a high speed usb port. I connected it directly to the pc and now it's working.