adb works but fastboot doesnt

I was able to use the asus v7 unlock tool successfully, and now am at the "The fun begins" step of http://forum.xda-developers.com/tran...tf300-t3061648[Beginners Guide]

it seems my adb works but fastboot doesnt?

c:\adb>adb devices
List of devices attached
C4OKCT035589 device


c:\adb>fastboot devices

c:\adb>

seems odd.