Are all the jar files that come with JFreeChart in the WEB-INF/lib directory?
By the way, I doubt that this will work. JSPs are for generating text, not binary data like images. It is very easy (inadvertently) to introduce extraneous whitespace in the page, which will corrupt the image you're trying to generate. Your page looks like it does that.
I'd either create the image in a servlet, store it on the server, and then reference it from the web page, or use the cewolf tag library, which makes the whole process much easier. Seriously, why don't you look into cewolf? [ March 06, 2007: Message edited by: Ulf Dittmer ]