LinuxQuestions.org - Bluetooth headset, many doubts

Hello!
I'm running Slackware with 2.6.26 kernel.
I've got bluez-utils,libs version 3.26 (Slackware 12.1 precompiled package), and kdebluetooth.
I'm using a Digicom Palladio Usb Bluetooth adapter.
In general, bluetooth seems to work; I can send files to my Nokia phone.
Now, I've got this Bluetooth stereo headset (brand rather unknown, and I've thrown the package away, I've only got the little user manual, and there is no indication on who built this thing).

This is what I've tried so far:
- turn the headset on and turned pairing mode on;
- kbluetooth -> Configuration -> Input devices (input?) -> Search;
- kbluetooth finds the headset and asks that I insert the pin code; a little star appears next to the name of the headset ("Stereo Headset"), but after a couple of seconds disappears and at the same time I hear a beep coming from the headset (disconnection?). Anyway, just before the beep, noise came from the headset (as if it had turned on), then, after the beep, nothing.
- Important thing: the headset manual says the Usb dongle must support A2DP and AVRCP. I don't know how to find out whether my dongle supports them, anyway, if I execute 'sdptool', in the "Services" section I get:

Code:

        DID SP DUN LAN FAX OPUSH FTP PRINT HS HF HFAG SAP NAP GN PANU

        HCRP HID KEYB WIIMOTE CIP CTP A2SRC A2SNK AVRCT AVRTG UDIUE UDITE

        SEMCHLA SR1 SYNCML SYNCMLSERV ACTIVESYNC HOTSYNC PALMOS NOKID

        PCSUITE NFTP NSYNCML NGAGE APPLE ISYNC

Does this mean that bluez/my usb dongle doesn't support A2DP?
- Anyway, I followed the instructions on "Bluez - Trac - AudioDevices" (http://wiki.bluez.org/wiki/HOWTO/AudioDevices) and added the specified part to .asoundrc. Of cource, even if I tell xine to use "bluetooth" as pcm device, it says the device is unknown.

Does anyone have any suggestion?
Thanks!