By the way, are these the steps to follow?
===go back to fastboot
1. Goto:
MOTODEV > Products > Device Software for stock USA 3G and Wifi Images
2. signup and download the files you need
3. extract all the img's into the tools folder
4. with the command prompt open type: cd "replace with tools directory location"
5. disconnect your xoom from your computer and shut off the xoom
6. at the prompt type: fastboot oem unlock
7. it will say waiting for device
8. now plug it into your computer and reboot into fastboot by holding the down volume button and power on
9. follow the on screen instructions and agree to everything
10. your device will reboot you will get the motorola dual core window
11. force restart device by holding volume up and pressing the power button right after the device shuts off hold the down volume button and press power button
12 you should now be in fastboot mode
13. then copy each line one by one into the command window. This will allow you to go back to factory settings like you bought it from the store
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash recovery recovery.img
fastboot flash userdata userdata.img
fastboot erase cache
fastboot oem lock
====
Thanks