Page images show in IE7 but not in firefox

Using html 4.01. Neither my background image nor my photos show in Firefox for this page:
http://www.skagitriverjournal.com/Ads/JoyBakeryAd.html
But they show up fine in IE 7.0

Here is the system info
OS Name Microsoft Windows XP Home Edition
Version 5.1.2600 Service Pack 2 Build 2600
IE Version 7.0.5730.11

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14

I have run the page through four validators and do not get any errors that would answer this. Does anyone have a solution?
Thank you,
Noel
skagitriverjournal@gmail.com