QT 5.3.2 Bluetooth Application not working

[Teddy John]

Hello Everyone,
Recently I tried to run QT examples in my wandboard after building complete rootfs by refering the below link,
http://wiki.wandboard.org/Building_Qt5_using_yocto_on_Wandboard.

With a USB Bluetooth Dongle, I am able to setup and work with BT Interface by using basic linux commands. But in the sample app (btscanner), the 'Scan' button and 'Discoverable' checkbox seems to be disabled. I am not able to see any error logs when I run this application. Do I miss something in my configuration or any service that needs to be run?