What version of Premiere Elements and on what computer operating system is it running?
How did you save your Timeline content which included the narration clip produced with the project's Narration Tool?
Publish+Share/Computer/ and then what? And, what preset? And, for that preset, did you use the default settings of the preset
or did you customize the preset under its Advanced Button/Video Tab and Audio Tab?
What other audio was in the project - any on Audio 1 or Soundtrack? Did you get involved with Smart Mix at all?
Let us start here. We will be watching for your follow up.