admin_detail.xml points to /rhn/schedule/PackageList.do. There is not struts-config.xml mappign for that action. Also, there isn't any page for that list. Please see /network/schedule/package_list.pxt?aid=19820517 page for implementation. Results in a 404 error. Add the correct struts-config.xml entry and add the jsp page.
PackageList.do action mapping and page added.