How to call InitQuery in OAF Page

in Application Module Impl.java

    public void initQuery(String ProjectNumber, String TaskNumber) {
     System.out.println("Entered initQuery");
     CRCPoetFinderVOImpl vo = (CRCPoetFinderVOImpl)getCRCPoetFinderVO1();
     //vo.setWhereClause(null);
     System.out.println("Value passed to ProjectNumber is "+ProjectNumber);
     System.out.println("Value passed to TaskNumber is "+TaskNumber);
     //vo.setWhereClause("project_number = :1 and task_number = :2");
     vo.setWhereClause(" project_number = "+"'"+ProjectNumber+"' and task_number = '"+TaskNumber+"'");
     //vo.setWhereClauseParams(null);
     //vo.setWhereClauseParam(0, ProjectNumber);
     //vo.setWhereClauseParam(1, TaskNumber);
     vo.executeQuery();
    }

In CO

    OAApplicationModule am = pageContext.getApplicationModule(webBean);
    //ViewObject vo = am.findViewObject("CRCPoetFindVO1");
    String ProjectNum = pageContext.getParameter("ProjectNumber") ;
    String TaskNum = pageContext.getParameter("TaskNumber");
    Serializable[] parameters = {ProjectNum, TaskNum};
    System.out.println("AM Method is called");
    am.invokeMethod("initQuery", parameters);