also make sure the Motorola Device Manager software is correctly installed on whatever computer you're using for the RAZR Blade root hack. For some reason, it wouldn't install properly on my Win7 machine, even though the installatino wizard thing appeared normal. The service in Windoze never started, and would not run. I installed the Moto crap on another Win7 machine and it worked like a charm. Let the Razr Blade slice some stuff up, and root=yes.
You can get a simple root checker app to make sure you have full root, also.