Why won't Wavelab let me hear my project?

Hi guys. I’ve decided to use Wavelab to enhance my music, but I can’t really get the hang of it. I’ve imported a recording of myself playing guitar into Wavelab, but whenever I click the play button in Wavelab, it plays the track, yet I can’t hear anything :neutral_face: I don’t understand why. Is there any general solution to that?
The version of Wavelab I’m using is Wavelab LE 7 by the way.

Thanks in advance.