[2005] Stored Procedure Output Parameters

I have two stored procedures one generates an output parameter that I then use in the second stored procedure.

Code:

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Try
                Dim myCommand As New SqlCommand("JP_GetChildren", myConn)
                myCommand.CommandType = Data.CommandType.StoredProcedure

                myCommand.CommandType = Data.CommandType.StoredProcedure
                myCommand.Parameters.Add(New SqlParameter("@ParentRule", Data.SqlDbType.NVarChar))
                myCommand.Parameters.Add(New SqlParameter("@PlantID", Data.SqlDbType.NVarChar))
                myCommand.Parameters.Add(New SqlParameter("@New_ReleasingRulePrefix", Data.SqlDbType.NVarChar))
                myCommand.Parameters.Add(New SqlParameter("@New_ReleasingRuleSuffix", Data.SqlDbType.NVarChar))
                myCommand.Parameters.Add(New SqlParameter("@New_PlantID", Data.SqlDbType.NVarChar))
                myCommand.Parameters.Add(New SqlParameter("@New_RuleSetID", Data.SqlDbType.NVarChar))
                myCommand.Parameters.Add(New SqlParameter("@Count", Data.SqlDbType.Int))
                myCommand.Parameters.Add(New SqlParameter("@IDField", Data.SqlDbType.NVarChar))

            Dim OParam As New SqlParameter()
            OParam.ParameterName = "@IDFieldOut"
            OParam.Direction = ParameterDirection.Output
            OParam.SqlDbType = SqlDbType.NVarChar
            myCommand.Parameters.Add(OParam)


                myCommand.Parameters("@ParentRule").Value = txtParentRule.Text
                myCommand.Parameters("@PlantID").Value = txtStartingPlantID.Text
                myCommand.Parameters("@New_ReleasingRulePrefix").Value = txtReleaseRuleFromPrefix.Text
                myCommand.Parameters("@New_ReleasingRuleSuffix").Value = txtReleaseRuleFromSuffix.Text
                myCommand.Parameters("@New_PlantID").Value = txtEndingPlantID.Text
                myCommand.Parameters("@New_RuleSetID").Value = txtEndingRuleSetID.Text
                myCommand.Parameters("@Count").Value = 1
                myCommand.Parameters("@IDField").Value = " "
            myCommand.Parameters("@IDFieldOut").Value = 0

            myCommand.ExecuteNonQuery()

            Dim IDField As String = myCommand.Parameters("@IDFieldOut").Value

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If i run this stored procedure in sql it does return my parameter. But when i run this code IDField comes back null. Any ideas