What does this mean? Are there error messages? If so, which ones, and where do they appear?
As far as the web server/servlet container is concerned, applets are just regular static files to be served. Just put all of them (HTML, class files, Jar files, etc.) in a publicly accessible directory, and it should work.
A common mistake is to put the class files and/or jar files inside of the WEB-INF directory. That directory is not publicly accessible, and thus the browser won't be able to download them from there.