Bluetooth S9 headset via PalmOS' Softick Audio Gateway (BTW, error code = 5: "There was an error during background operation" means wrong serial key) with the A2D2 technology is good but will cause video audio out of sync, such as in TCPMP.
Solution: in TCPMP go to Preferences - General - Set A/V sync offset by (-180 in my case) msec.