No A2DP streaming audio from 12.04 to Bluetooth headset

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http://askubuntu.com – I want to listen to streaming audio from Ubuntu using headset (Bose Bluetooth Headset Series 2 http://goo.gl/4Wt1A). Although Bluetooth connection is established, I haven't been able to hear anything via the headset. How can I work this around in general (I know it might sound brutal but I don't have much knowledge in audio setting on linux) ? When I use my other Bluetooth headset BlueAnt Q2 (http://www.myblueant.com/products/headsets/q2/index.php) streaming is going. In "Hardware" tab on sound setting panel (not sure how it's officially called but see the image below) shows my headset. How (HowTos)