Feedback issue on Stop/Start?

[xx1messxx]

A question for you Mbox users. I am working on a project right now of a live Television broadcast of a band, mixing about 50 minutes of audio, about 12 tracks, and 3 aux inputs. When I play the first song and then stop it, I get a weird high-pitched noise through the program. If I switch to the Mix view, it shows signal on the last 3 tracks I imported (guitar, bass, and vox) on the master fader, and on the 3 aux tracks. If I stop it at any other point in the program (besides the first song) it is fine, but as soon as I do it for the first song, NOISE! Any ideas what might be causing it?

[41217]

That happened/keeps happening to me on one particular session that i have!!Dont know why it happens,but usually pressing the mute button repeatedly works for me!!