I have LennySH Rom 6.1 and I could only get the Bluetooth stack to work with my Plantronics 220 headset, no Activesync ect. So I went on the hunt for a new stack.After lot of trys this one (see below) works with Activesync.
Im still testing I have'nt tryed it with my headset yet.
What I did was back up all info. Hard reset and just install.
BT Stack.zip
You may not have to hard rest but DO back up info.