Crysral Reports: The maximum report processing jobs limit configured by your system administrator

I am using this code to  search records from 

when i goto this page i am getting this error 

The maximum report processing jobs limit configured by your system administrator has been reached

i couldnt find this path HKEY_LOCAL_MACHINE\SOFTWARE\CRYSTAL DECISIONS\10.0\REPORT APPLICATION SERVER\SERVER\PrintJobLimit to make it -1 for unlimited print job

 protected void Button2_Click(object sender, EventArgs e)
    {


        if (TextBox2.Text == "" && TextBox3.Text == "" && TextBox4.Text == "")
        {
            DateTime date = Convert.ToDateTime(TextBox1.Text);
            SqlCommand cmd = new SqlCommand("SELECT * FROM Transactions where report_type = @report_type and  dateadd(dd, datediff(dd,0, [R_date]), 0) = @R_date  ");

            cmd.Connection = con;
            cmd.Parameters.Add("@report_type", SqlDbType.NVarChar).Value = DropDownList1.SelectedValue;
            cmd.Parameters.Add("@R_date", SqlDbType.DateTime).Value = date.Date;
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            dt.Clear();
            da.Fill(dt);

        }
        else if (TextBox2.Text != "")
        {
            con.Open();
            string s = ("Select * from Transactions where idcount like '%" + TextBox2.Text + "%' or Patient_ID_NO like '%" + TextBox2.Text + "%'or Patient_no like '%" + TextBox2.Text + "%'");
            SqlCommand cmd = new SqlCommand(s, con);
            cmd.Parameters.Add("@idcount", SqlDbType.Decimal).Value = TextBox2.Text;
            cmd.Parameters.Add("@Patient_ID_NO", SqlDbType.Decimal).Value = TextBox2.Text;
            cmd.Parameters.Add("@Patient_no", SqlDbType.Int).Value = TextBox2.Text;

            SqlDataAdapter da = new SqlDataAdapter(cmd);
            dt.Clear();
            da.Fill(dt);

            TextBox2.Text = "";

        }
        else if (TextBox3.Text != "")
        {
            SqlCommand cmd = new SqlCommand("SELECT * FROM Transactions where report_type = @report_type   ");
            cmd.Connection = con;
            cmd.Parameters.Add("@report_type", SqlDbType.NVarChar).Value = DropDownList1.SelectedValue;
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            dt.Clear();
            da.Fill(dt);

            TextBox3.Text = "";

        }
        else
        {
            DateTime date = Convert.ToDateTime(TextBox4.Text);
            SqlCommand cmd = new SqlCommand("SELECT * FROM Transactions where dateadd(dd, datediff(dd,0, [R_date]), 0) = @R_date  ");
            cmd.Connection = con;
            //cmd.Parameters.Add("@report_type", SqlDbType.NVarChar).Value = DropDownList1.SelectedValue;
            cmd.Parameters.Add("@R_date", SqlDbType.DateTime).Value = date.Date;
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            dt.Clear();
            da.Fill(dt);

            TextBox4.Text = "";
        }
        
        if (dt.Rows.Count > 0)
        {

            ReportDocument MedicalReport = new ReportDocument();
            MedicalReport.Load(Server.MapPath("~/CrystalReport2.rpt"));
            MedicalReport.SetDataSource(dt);
            MedicalReport.SetDatabaseLogon("sa", "123", @"ROOM-8", "Mreport");
            CrystalReportViewer1.ReportSource = MedicalReport;
            CrystalReportViewer1.DataBind();
            MedicalReport.Dispose();


        }

        con.Close();
   
    }