Oracle apps policy with C# mo_global.set_policy_context

How to allow the policy to use Oracle Views (Applications) before report (RDLC) in Report Viewer.

Something like this:

SELECT AMOUNT_APPLICABLE_TO_DISCOUNT From
AP_INVOICES_V

I need to call this PL/SQL Before (Policy Package) Using this select statement:

Begin
mo_global.set_policy_context('S',90);End;

so I did this on page load before setting the SQL Data source to the report:

if(!IsPostBack){

            db.connectODB();OracleCommand ora_cmd =newOracleCommand("mo_global.set_policy_context", db.con);
            ora_cmd.BindByName=true;
            ora_cmd.CommandType=CommandType.StoredProcedure;

            ora_cmd.Parameters.Add("P_ACCESS_MODE",'S');

            ora_cmd.Parameters.Add("P_ORG_ID",90);

            ora_cmd.ExecuteNonQuery();}

But still no data retrieved.