Tracks doesn't sound when pasted!

[franzmusic]

I copied some tracks from a DP project and pasted them into another one. Some tracks sounded regularly, while others did not sound at all.
The Aria Player was active, the track was selected, the incoming signal was visible, I maximized the volume of the track, but did not sound. According to you why?

[arumdevil]

Check that the outputs assigned to your tracks are “connected” to your actual speaker outputs in DP’s bundles window.