Running adb with the 'devices' keyword and NOT getting any devices listed should tell you that you DON'T have a suitable USB driver installed.
Try the 'universal' driver found here: http://download.clockworkmod.com/test/UniversalAdbDriverSetup6.msi
Restart your computer for good luck and then run adb again. Make sure that your tablet is connected to your PC and tat your cable is good. When your device is finally recognized by adb you can then see if you still have a publishing problem.