I've been having a problem with my ringers. When I specify any ringer on my 650,be it the included ringers or ones I imported in,they will not work when a known call comes in. The same ringers will work when an unknown call comes in,i.e.,one that is not in the contacts list or one with no caller id. Vibrate will work for all though,whether known or unknown. I've tried soft resetting. Should I just do a hard reset and go from there?
Any ideas?

Thanks