I have the same problem. If i request authentification from my phone, it works. But i cant pair device from computer.
hcitool scan scans devices good, but i cant connect to phone via obex or rfcomm. sdptool outputs connetion timeout.
string from lsusb:
Bus 002 Device 002: ID 1131:1001 Integrated System Solution Corp. KY-BT100 Bluetooth Adapter