Sorry to hear about the recent issues you have been experiencing.
When you create a New Song check "Play Overlaps."
![](http://answers.presonus.com/?qa=blob&qa_blobid=7337455654463506806)
If a song is already open and the option was not selected, use the track Inspector. Place a check mark on "Play Overlaps" in the Inspector for each track.
![](http://answers.presonus.com/?qa=blob&qa_blobid=4486277802563935857)