cannot change text message tone

[rex]

phone - galaxy ace
i cannot change the text tone to any but the default. i have gone to settings / sounds/ notification ringtone. no matter which one i choose, there is no change to the tone.
the phone ringtone changes fine when i choose a different tone.
any ideas welcome

 

[sdrawkcab25]

you probably need to go into the settings of your texting app, you should find an option to change the tone in there