So does sound work on it at all?
(can you play music/etc?)
If so, under Profile->Advanced->Normal (or whatever profile you've using) -> phone
- Out of Holster & In Holster is set to Vibrate & Tone (or just Tone)?
- Volume = a number (not Mute)
If Tone (or Vibrate & tone) is selected & you click to change the Ring Tone, it should play a sample of the new ringtone.