Fotiman - 4:24 pm on Feb 9, 2011 (gmt 0)
I'm going to throw out some suggestions... can you get to the jar file? Is it in the correct location relative to the page? If you point the browser directly at the jar file itself, what happens? Are there any file permissions that need to be set on the jar file?
Not sure if that will help any, but it's where I'd start looking.