Vzw Motorola Xoom usb cable to HTC Thunderbolt

I down loaded an easy tether app on my xoom and phone so I could avoid the vzw hotspot fee
Before u even turn on ur device BT, have u checked airplane mode first, give it a few seconds, then check Bluetooth, then on ur device u check BT again?
Btw what honeycomb version are u running? If its the new 3.2 u need to shut down ur Xoom each time. Not sure why but I have to do it with mine