SSIS Olebd source Sql Command Union Error

Hi ,

I am using SQl Command access mode in SSIS oledb Source, I have to get current and previous month data from table My command is like : Select M.prd_dt,M.Order_id,M.Name from Table M where M.prd_dt=? Union Select MI.prd_dt,MI.Order_id,MI.Name from Table MI where MI.prd_dt=? order by M.OrderID

When I click parameter its says parameter can not be created..... and I am not able to parse.. Whereas on my management studio I am able to run this query..

please suggest..