Geolocation always muted in iPhone

1. Installed the last version of Air 2.7;
2. Initialisation of the geolocation class with conditional verification muted / !muted, setRequestedUpdateInterval( 5000 );
3. On the air app xml tried the two ways, UIRequiredDeviceCapabilities ( gps ) and compile with default;
4. Tested in three iPhone's 4;
 

With the all Location Services On the air app always detect that the gps is muted.

Please, does anyone know's what could be the problem?

Cheers,
Bruno