please help .....had 2.1 with root and now 2.2 and have nothing anymore

[truckinmouse]

please help i had a rooted dinc 2.1 (su permissins,free wireless tether...etc....) i recieved the 2.2 froyo ota and my tether nolonger works. the su permissions app is still there on my app page. can i roll back to 2.1 and re root...can i root know....am i still rooted...wtf.... any input will be greatly appreciated