Exported MIDI File from Musescore not playing audio in Ableton

I'm trying to record an acapella vocal arrangement in Ableton and use the MIDI tracks from the arrangement I made in Musescore to follow along with as I record.

For some reason, when I create the MIDI of my arrangement in Musescore, and drag and drop it into Ableton, I can SEE that the MIDIs transfer over but when I play it back I can't hear any audio from any of the tracks.

For reference, I can successfully record vocals in Ableton, I just can't hear the tracks from the MIDI that I created from my musescore arrangement.

Help?