We are running CUCM 11 and had uploaded a new Music On Hold Audio file (NewAudio). We set the Music On Hold Audio Source 1,2,and 3 to point to this new file (NewAudio). Everything worked fine. Now we want to change it back to the SampleAudioSource. We set the Music On Hold Audio Source 1,2,and 3 to point to the SampleAudioSource. But, the music on hold message is still the playing NewAudio. What did we miss here?