Thanks for sharing. Your audio is there, but it's extremely weak in volume. Check Debut/Windows recording settings for your next production.
To correct this file yourself...
Load the AVI file into Videopad and place it on the sequence
Right-click the audio track and EDIT IN WAVEPAD
In Wavepad click the LEVELS tab.
Click NORMALIZE on the toolbar and click APPLY
Click the red X at the top-right then click SAVE | OK
The corrected audio file will be loaded into Videopad