No sound audible with wavelabs elements


I’m looking for some advice on using Wavelab elements on my home Windows laptop.
Currently when I open audio files in Wavelabs no sound comes out.
I’m using an ASIO4ALL audio device/soundcard which has installed okay but when I look at the Left and Right channels in the Audio connections>Playback tab, both say ‘not connected’ so I’m wondering if it has something to do with this. Would really appreciate any advice anyone has to give!