I'm getting the "Missing Parameter Values." error when I try to pass a value from a drop down list into the report.  The report itself is based on a stored proc.  I'm a newbie to .Net and I've been stumbling along trying to piece together this stuff.  I can view the value of the parameter until it's passed into the report (which is viewed in a crystal report viewer control on another page)  Any help in this matter is greatly appreciated.  My code is as follows:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;


public partial class utilrptview : System.Web.UI.Page
{
    protected void SetParameterFields()
{
    ReportDocument rpt = new ReportDocument();
    rpt.Load(Server.MapPath("Reports\\util2.rpt"));
ParameterFields paramFields = CrystalReportViewer1.ParameterFieldInfo;
ParameterField paramField = paramFields["@machineid"];
ParameterValues curValues = paramField.CurrentValues;
ParameterDiscreteValue discreteValue = new CrystalDecisions.Shared.ParameterDiscreteValue();

discreteValue.Value = Request.QueryString["machineid"];
curValues.Add(discreteValue);      
CrystalReportViewer1.ParameterFieldInfo = paramFields;

   
 //.ApplyCurrentValues(curValues);
      
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        ReportDocument rpt = new ReportDocument();
        rpt.Load(Server.MapPath("Reports\\util2.rpt"));

        //  Get connection settings from AppSettings in Web.Config
        string strConnInfo = ConfigurationManager.AppSettings["CrystalReportConnection"].ToString();
        string[] connValues = strConnInfo.Split(';');
        string serverName = connValues[0];
        string dbName = connValues[1];
        string userID = connValues[2];
        string password = connValues[3];
          
        rpt.SetDatabaseLogon(userID, password);
        ReportLogOn();
        //rpt.Refresh();
        SetParameterFields();
        CrystalReportViewer1.ReportSource = rpt;
       

    }
    private void ReportLogOn()
    {

        TableLogOnInfos tableLogOnInfos = new TableLogOnInfos();//CrystalReportViewer1.LogOnInfo;
        string strConnInfo = ConfigurationManager.AppSettings["CrystalReportConnection"].ToString();
        string[] connValues = strConnInfo.Split(';');
        string serverName = connValues[0];
        string dbName = connValues[1];
        string userID = connValues[2];
        string password = connValues[3];

        ConnectionInfo connectionInfo = new ConnectionInfo();
        connectionInfo.ServerName = serverName;
        connectionInfo.DatabaseName = dbName;
        connectionInfo.UserID = userID;
        connectionInfo.Password = password;
        TableLogOnInfo tbl = new TableLogOnInfo();

        tbl.ConnectionInfo = connectionInfo;
        tableLogOnInfos.Add(tbl);
        CrystalReportViewer1.LogOnInfo = tableLogOnInfos;
       
    }

    protected void CrystalReportViewer1_Init(object sender, EventArgs e)
    {

    }
}

Thank you.  I'll work this in.

The error is not a CR error but an ADO.net error. To troubleshoot this and these are things you may have done....