What should be loaded first BTSCOSND(bluetooth audio driver) or BTD.dll bluetooth stack.

Hello all,
I am writing an application which configures connectivity between
bluetooth audio gateway and a blueatooth headset and then it opens
bluetooth audio driver to play file in order to listen on headset.
But my problem is during imageloading - bluetooth audio driver
loads first and tries to establish HCI communication, but still
BTD.dll(stack) hasnt loaded so it fails and i couldnt play sound file.
I tried to change the order of laoding but i couldnt find the
registry settings for BTD.dll and i couldnt find who loads it and same
for btscosnd.dll.
so please help me findout cause of the problem.
Thanks in Advance and i hope i will get a reply soon,
Darshan

.