[ubuntu netbook remix] Can't use BlueTooth on Acer Aspire AO722 Netbook!

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http://ubuntuforums.org – Hello! I'm using a netbook- Acer Aspire 722, 2gb ddr3 ram, 1ghz AMD c60 dual core processor, 500gb hdd, AMD Radeon-6290 graphics. It has a built-in bluetooth device which i can use in windows os. i use a dial-up connection through my phone via bluetooth. I setup ubuntu 11.10 on my netbook recently, i'm new user of ubuntu and i'm very interested to use this os but the disappointing fact is when i log in ubuntu the bluetooth sign is active on the top right corner but when i try to "add a device" it found nothing. Please help!!! This is the reason i can't use ubuntu so please if someon (Hardware)