When I tried using "hcitool inq" and "hcitool scan" commands, they returned no results, although I had a connection over which I was using putty!  Then the system crashed (due to an "hcitool cc" command) and after reboot, these commands started acting normal again, and they found the USB BT adapter on my Windows XP system.  What could have been the problem and is there any way to trace such problems?

Also, when I do "hcitool rssi bdaddr" where bdaddr is the MAC id of the above BT adapter, the command always returns an RSSI value of zero.  Why is this?

Thanks in advance -