I have installed the Monsters Inc winterboard sound theme and selected the horn as the default sms sound, when I select the horn I can hear the Monsters Inc sound but when I recieve an sms I still only hear the horn sound. All the other sounds from the theme work perfectly,

I tried some other sound themes and I am having the same problem, cannot get the sms sounds for the particular theme to work, I have searched the forum and cannot find a post from anyone having this problem, does anyone know anything about it?