VideoStudio :: X4 - Make Some Short Slideshows To Be Embedded In Websites?

I'm using VSP X4 to make some short slideshows to be embedded in websites. I have been successful in creating them and converting into a WMV movie for broadband, 320 x 240 for fast loading on the website page.

All works well in terms of the slideshow presenting on the site page, but no matter how I size the container, or change the object code when converting, the slideshow always has a black bar at the top and the bottom of the slideshow. I've changed aspect ratios with no success in removing these black bars. I use CSS to create the container for the slideshow, and the container is coded for a white background, yet, the slideshow continues to have these black bars at the top and bottom. how I can remove these, assuming it's VSP4 that's creating them?