Trying to improove A2DP sound quality

[lifeisfun]

I downloaded A2DP audio improvement CAB
When I check the registry everything is as described except
that it didn't create this entery:
HKEY_LOCAL_MACHINE\Drivers\BuiltIn\BtA2dpSnd
Add "Priority256 "= dword:60 (Use Dword Value)
When I try to create it manually I get error access denied
What shoul I do ?

Thanks



Description of the CAB file:
improve listening to music via bluetooth
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Bluetooth\A2 DP\Settings
UseJointStereo: change the DWORD from “1” TO “0” no quotes.
HKLM\Software\Microsoft\Bluetooth\A2DP\Settings\Bi tPool to 50
HKLM\Software\Microsoft\Bluetooth\A2DP\Settings\Ma xSupportedBitPool to 50
HKEY_LOCAL_MACHINE\Drivers\BuiltIn\BtA2dpSnd
Add "Priority256 "= dword:60 (Use Dword Value)
HKLM/SOFTWARE/Microsoft/Bluetooth/AudioGateway/Capability
(Dword:69)(Default is 37)