Creating a Hyperlink with the parameters that doesn't have a mappinig field

Hi I've two different reports as[b]1.[/b] FlightSummary ReportSELECT FlightDate, Count (PassengerID) as PassengerCount, Sum(TktPrice) as RevenueFROM dbo.FlightInfoWHERE FlightDate BETWEEN @StartDate AND @EndDate AND (FlightNumber = @FltNum OR @FltNum IS NULL) [b]2[/b] Passenger Details ReportSELECT PassengerID, PassengerName, FlightDate, FlightNumber, SeatNumber,AgentSineFROM dbo.ReservationWHERE FlightDate BETWEEN @StartDate AND @EndDate AND (FlightNumber = @FltNum OR @FltNum IS NULL); Now, I need to create a hyperlink on the "PassengerCount" Column of the "Flight Summary Report". I created the below hyperlink on the PassengerCount Column and it is working fine without the @FltNum Param. [b]=iif(Fields!PassengerCount.Value <> 0,"void(window.open('http://ServerName/ReportServer?/FolderName/PassengerDetailReport&rs:Command=Render&StartDate=" & Fields!FlightDate.Value & "&EndDate=" & Fields!FlightDate.Value & "'))",false)[/b]The problem here is I don't have FlightNumber field in my Summary report. Is it even possible to create a hyperlink without the mapping field in the main report??Let me know.Thanks