i have created SP with a parameter.
then i created a report bind to this SP with parameter
parameter is @coname in SP

when i want to display it in crstal viewer, theres no data.

but when i create same stopred proced with no parameter
bind it to crsyla repots as datasource. then in crystal i made my parameter which is "coname " then call this in my vb.net form inside crytal report then it shows. what the problem

tnx in advance



heres the code

Imports CrystalDecisions.CrystalReports.Engine
    Imports CrystalDecisions.Shared
    '
    ' Load the selected report file.
    '
    Dim CR As New ReportDocument
    CR.Load(strReportPath)
    '
    ' Declare the parameter related objects.
    '
    Dim crParameterDiscreteValue As ParameterDiscreteValue
    Dim crParameterFieldDefinitions As ParameterFieldDefinitions
    Dim crParameterFieldLocation As ParameterFieldDefinition
    Dim crParameterValues As ParameterValues
    '
    ' Get the report's parameters collection.
    '
    crParameterFieldDefinitions = CR.DataDefinition.ParameterFields
    '
    ' Set the first parameter
    ' - Get the parameter, tell it to use the current values vs default value.
    ' - Tell it the parameter contains 1 discrete value vs multiple values.
    ' - Set the parameter's value.
    ' - Add it and apply it.
    ' - Repeat these statements for each parameter.
    '
    crParameterFieldLocation = crParameterFieldDefinitions.Item("@coname")
    crParameterValues = crParameterFieldLocation.CurrentValues
    crParameterDiscreteValue = New CrystalDecisions.Shared.ParameterDiscreteValue
    crParameterDiscreteValue.Value = strStartDate
    crParameterValues.Add(crParameterDiscreteValue)
    crParameterFieldLocation.ApplyCurrentValues(crPara meterValues)
    '
    ' Set the Crytal Report Viewer control's source to the report document.
    '
    CrystalReportViewer.ReportSource = CR