I have the Nokia Luna bluetooth earpiece left over from my Lumia 900, but for some reason I can't seem to get it to pair with my 920. Has anyone else done this successfully or run into the same problem I have? Older version of BT maybe? Shouldn't it be backwards compatible though. I can't quite figure it out. The thing is charged, it worked fine on my 900, but the 920 just won't see it.