Tizen Developers

Hi,

 May I know how to change the ringtone from a program. I have used the api  system_settings_set_value_string(SYSTEM_SETTINGS_KEY_INCOMING_CALL_RINGTONE, "/opt/usr/share/settings/Ringtones/Mystic_Tone.ogg"), but it does not seem to make a difference.  The error returned is -5

Thanks and Regards

Rajesh