Don't know what you are doing wrong, but do you have the ballpark images specified like this:
<img src="http://hometown.aol.com/sdvibert/images/parkeditor.jpg" alt="" />
Thats what I use and I see this:
<img src="http://hometown.aol.com/sdvibert/images/southwestairlinesfield.jpg" alt="" />
Hope this helps.