Help Can no longer assign cutom ringtones


Suddenly and for no apparent reeason, my Exhibit 2 4G will not play the ringtones I've assigned to different contacts. It plays the default tone for everyone no matter what's assigned.

I've already tried rebootong the phone. Have tried rebooting after removing and replacing the battery. Have tried removing the SD card. None of these things work.

Any ideas? All help greatly appreciated.