If you are using the wifi tether for root users on the market, its not going to work. You need the newer version or whatever that works with it.
Here: Install this then reboot the phone.
http://code.google.com/p/android-wif...4.apk&can=2&q=
If you goto su permissions all that is is a screen that shows what apps you have give root access too....if you haven't given any...its gonna be blank.