Problems with Cycle Slideshow in IE7 (and IE6)

I'm using a simple fade slideshow of 5 images on my site's home page. This works fine in everything except IE6 and IE7. In these browsers, all of the images are displayed at the same time one right after another. The slideshow does not cycle...it is static images.

Here's my site: http://nwdogshots.com

Please Help!

Thanks,
Bruce