Steps to hear custom rings thru bluetooth

I just bought an HS850 bluetooth head set. But I can not hear my customs ringtones thru it. Can someone tell me how to do it? I have a Blackberry curve 8330. Thanks

I called all over and finally rim told me that they took that feature away, because people complained that the ringtones were too loud. I am thinking about getting rid of mine. They said all os after 4.5 disabled this feature.:eek: