sound waves but no sound on playback of recording

when i record a track via my usb interface itrack solo it records as i can see the wave form on my laptop ,but when i play it back theres no sound through my stereo . however if i play back a wav file i have in audacity it sounds, you tube videos also sound through the stereo via my laptop.any help thanks.

Are you sure you recorded tall blue waves that look something like this?

Are the green meters bouncing when you play that track in Audacity?

Make sure you have not muted the recorded track (the Mute button to left of the waves).

If you need more help please give us your Audacity version and version of Windows (see the pink panel at the top of the page).