DWR的问题。

使用dwr的时候出现问题了。
JSP页面代码：UserProjectManager.saveUserPro(name,region,roleName,organization,${user.id});
后台JAVA代码：public class UserProjectManagerImpl extends GenericManagerImpl<UserProject, Long> implements UserProjectManager {
    private OrganizationManager organizationManager;
    private UserProjectManager userProjectManager;
    private ProjectManager projectManager;
    private RoleManager roleManager;
    UserProjectDao userProjectDao;
    private UserManager userManager;    public UserProjectManagerImpl(UserProjectDao userProjectDao) {
        super(userProjectDao);
        this.userProjectDao = userProjectDao;
    }    public void removeRecord(long id){
        userProjectDao.remove(id);
    }    public void saveUserPro(String name,String region,String roleName,String organization,String user_id){
        UserProject userPro=new UserProject();        List<Project> pro = projectManager.find("from Project where name=? and region=?",new String[]{name,region});
        userPro.setProject(pro.get(0));        Role role = roleManager.getRole(roleName);
        userPro.setRole(role);        User user= userManager.getUser(user_id);
        userPro.setUser(user);        String[] o=organization.split(" ");
        List<Organization> org = organizationManager.find("from Organization where id like '___' and name=? and sets=?",o);
        userPro.setOrganization(org.get(0));
        
        userProjectManager.save(userPro);
    }    public UserProjectManager getUserProjectManager() {
        return userProjectManager;
    }    public void setUserProjectManager(UserProjectManager userProjectManager) {
        this.userProjectManager = userProjectManager;
    }    public OrganizationManager getOrganizationManager() {
        return organizationManager;
    }    public void setOrganizationManager(OrganizationManager organizationManager) {
        this.organizationManager = organizationManager;
    }    public ProjectManager getProjectManager() {
        return projectManager;
    }    public void setProjectManager(ProjectManager projectManager) {
        this.projectManager = projectManager;
    }    public RoleManager getRoleManager() {
        return roleManager;
    }    public void setRoleManager(RoleManager roleManager) {
        this.roleManager = roleManager;
    }    public UserProjectDao getUserProjectDao() {
        return userProjectDao;
    }    public void setUserProjectDao(UserProjectDao userProjectDao) {
        this.userProjectDao = userProjectDao;
    }    public UserManager getUserManager() {
        return userManager;
    }    public void setUserManager(UserManager userManager) {
        this.userManager = userManager;
    }}
java代码中List<Project> pro = projectManager.find("from Project where name=? and region=?",new String[]{name,region});
为什么这个projectManager的值为null呢？
应该下面的所有Manager都是null，困惑中。
是不是dwr只传递了几个参数，所以其他的数据都没有啊。