Burning DVD with Encore CS6 - No Audio

I edited an event in Premiere Pro CC 2017 (using PC with Windows 7). 

I then Exported the sequence from Premiere with these settings for burning a DVD:

Format: MPEG2-DVD

Preset: NTSC DV Wide Progressive

I set the output to go into a new folder.

After the export, I opened Encore CS6 and imported the MPEG video (.m2v) and WAV audio (.wav) files.

I then created a new timeline and dropped these 2 files onto it.

The sequence plays perfectly in Encore!

OK; I'm ready to burn the disc.

I click on the Build tab and select Format: DVD, Output: DVD disc.

Click "Build"  (progress bar moving, looks like everything is working fine!)

DVD is finished, put it in my home DVD player; NO SOUND!

What might I have done wrong?

Thanks!

Chris