I was able to get the webpart to add to the page once we changed the Trust to Medium but now once I add it to the page and try to view it I get the following message.

A script in this movie is causing Adobe Flash Player 9 to run slowly. If it continues to run, your computer may become unresponsive. Do you want to abort the script?

Any Suggestions?

I was getting the same error - the only way I found to solve it was to type the full path to the image library - ie not "\Sites\Nameof document library\" as the web part suggests...but type the full "Http:\\" path etc ...