Hi there, It seems I got some class loading problem on Seam. I followed Seam/wiki/fileupload instruction to add the file uploading function (which worked on JBoss, JSF/EJB3), and put the tomahawk.jar in ear file. However, when I deployed my application to JBoss 4.0.4.GA, the myfaces/tiles cannot find its struts tiles class. If I put the tomahawk.jar in WEB/lib, the org/apache/commons/fileupload/disk/DiskFileItem could not be found. I really have no idea. Any help will be very appreciated. Thank you in advance. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3957950#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...