Mariav

I am new user of DEBUT I have recorded the discussion on my laptop with Debut, but I hear nothing when I play it back. Can I press a button to listen to the discussion or I've lost it for ever? If so, what I did wrong so I will not do it next time? I want to record discussions on my laptop with audio and video (mp4); what are the steps to follow, so I will not miss the audio next time? Kindly thank you Mariav