Simple help to add tracks on playlist

Hello guys.

Immediatly sorry my ugly english...
I'm not a Drupal expert manager, and for the first time someone ask to me to install a web radio on a site.
So, I choose Station, and I was able to create programs, schedule them, upload audio file.
It's all ok, but I have one big problem: I can't add tracks on playlist, and in this way the schedule says "on air" but nothing obviously come out from the program, because it's empty!
Please, can someone help me??

Many thanks for all you do for this wonderful module, that I hope to apply completely very soon.

Kunst