Help Needed: Bluetooth programming using iOS4

Hi,

I am a newbie iPhone programmer, and am trying to implement the code found on <http://blog.stormyprods.com/2008/08/most-useful-app-i-cant-release.html> to use BluetoothManager to turn BT on and off. The code apparently worked under 3.0, but although it compiles clean on iOS4, it doesn't actually do anything. Can anyone please help?

Thanks in advance!