Error in print report

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C#

ASP.NET

Hi,

I have 2 questions:
When I click on print button for my report, I recive following error.
Invalid report file path. from this line:rd.PrintToPrinter(1, false, 0, 1);
What do i do?
And for printing my report in asp.net in crystalreprot viewer, when I refresh my page, print button does not work properly, why?

using System;
using System.Data;
using System.Data.SqlClient;
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;
using CrystalDecisions.Reporting;

public partial class mojavez_Report : System.Web.UI.Page
{
    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["con"].ConnectionString);
    ReportDocument rd = new ReportDocument();
   
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            getdata();
        }
    }
    void getdata()
    {
        con.Open();
        SqlCommand com = new SqlCommand("SELECT DISTINCT MajorName FROM  Majores ", con);
        SqlDataAdapter da = new SqlDataAdapter(com);
        DataTable dt = new DataTable();
        da.Fill(dt);
        DropDownList3.DataSource = dt;
        DropDownList3.DataTextField = "MajorName";
        DropDownList3.DataValueField = "MajorName";
        DropDownList3.SelectedIndex = DropDownList3.Items.Count + 1;
        DropDownList3.DataBind();


        SqlCommand com1 = new SqlCommand("SELECT DISTINCT City FROM  DrInfo ", con);
        SqlDataAdapter da1 = new SqlDataAdapter(com1);
        DataTable dt1 = new DataTable();
        da1.Fill(dt1);
        DropDownList1.DataSource = dt1;
        DropDownList1.DataTextField = "City";
        DropDownList1.DataValueField = "City";
        DropDownList1.SelectedIndex = DropDownList1.Items.Count + 1;

        DropDownList1.DataBind();


        con.Close();
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
       
        rd.Load(Server.MapPath("MojavezReport.rpt"));
        rd.SetDatabaseLogon("", "", @".", "DrInfo ,Majores");
        rd.SetParameterValue("dname", TextBox1.Text);
        rd.SetParameterValue("startdate", TextBox2.Text);
        rd.SetParameterValue("dnum", TextBox3.Text);
        rd.SetParameterValue("sex", DropDownList4.Text);
        rd.SetParameterValue("city", DropDownList1.Text);
        rd.SetParameterValue("smarried", DropDownList2.Text);
        rd.SetParameterValue("majorename", DropDownList3.Text);
        CrystalReportViewer1.ReportSource = rd;
    }
    protected void Button2_Click(object sender, EventArgs e)
    {



        rd.PrintOptions.PrinterName = "HP LaserJet M1522n";
        rd.PrintToPrinter(1, false, 0, 1);
        CrystalReportViewer1.PrintReport();
    }