Advisory Warning not showing Requisition approval notification.

I try customize Requisition approval notification. We want to display Advisory warning message for over budget. some test instance is working fine. when i try do new test instance. it is not working. We don't know which case working.

AdvisoryWarningco.class  controll file. they using get parameter.  Get parameter is coming empty in new instance. which case it will show values. i really confuse problem in technical or setup.

String s = oapagecontext.getParameter("IsAdvWarn");

        String s1 = oapagecontext.getParameter("NtfId");

        String s2 = oapagecontext.getParameter("IsAmeExc");

        String s3 = oapagecontext.getParameter("DocType");

        String s4 = oapagecontext.getParameter("DocNum");

reg

sasikumar.r