TedPalmer
Are you working from the Premiere Elements 9.0.1 Update? And what computer operating system is involved?
What are the properties of these source wmv files and what project preset are you setting to match those video properties?
If your export is Share/Computer/Windows Media, what is your export preset and what are the Export Settings for the Video Tab and Audio Tab under the Advanced Button of the preset?
More later.
ATR