Mark I'm assuming this is your app and forgive me if i'm wrong. The Nextel 7520 doesn't function correctly on external power with your BBLight software. The light comes on when you initially plug in external power but goes back out again after the predefined setting in options. I'm running 4.0 and yes I've activated BBlight as all other functions (on activity and on unholstering) work like a champ. In discussions with other blackberry owners with different models this isn't a problem. Maybe they aren't understanding what it is that isn't working though who knows.