Logon Failed for Crystal Reports on server while configure with web server

I am using visual studio 2010 with crystal report for visual studio

when i am checking with my development machine it works fine

but when i deploy it on server it shows error that logon fail

I am using blank Password which works fine on local machine

Below is the Code which I am Using 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.OleDb;
using System.Data;
using System.Data.SqlClient;

using CrystalDecisions.Shared;
using CrystalDecisions.CrystalReports.Engine;

public partial class _Default : System.Web.UI.Page
{
    public string ServerConn = "Provider=SQLOLEDB;data source=DB;Initial Catalog=Shriraj;Persist Security Info=True;User 

ID=sa";
    OleDbConnection cn = new OleDbConnection();

    protected void Page_Load(object sender, EventArgs e)
    {
        OleDbConnection cn = new OleDbConnection();
        DataSet ds = new DataSet();
        DataTable dt = new DataTable();

        cn.ConnectionString = ServerConn;
        OleDbCommand cmd = new OleDbCommand();
        cmd.Connection = cn;
        cmd.CommandType = CommandType.Text;
        cmd.CommandText = "select * from [PhoneDetails]";

        try
        {
            cn.Open();
            cmd.ExecuteNonQuery();
            OleDbDataAdapter da = new OleDbDataAdapter(cmd);
            da.Fill(ds);
        }
        catch
        {
        }
        finally
        {
            cn.Close();
        }
        dt = ds.Tables[0];
        

        ReportDocument report = new ReportDocument   ();
  
       report.Load("E:\\practices\\update\\emp_details\\crystalreports\\CrystalReport1.rpt");

        report.Load(Server.MapPath("CrystalReport1.rpt"));

        //2. set logon info             
        CrystalDecisions.Shared.ConnectionInfo conn = new ConnectionInfo();
        CrystalDecisions.CrystalReports.Engine.Table myTable; 
        CrystalDecisions.Shared.TableLogOnInfo myLog;
        conn.AllowCustomConnection = true;
        conn.ServerName = "DB";
        conn.DatabaseName = "shriraj";     
        conn.UserID = "sa";      
        conn.Password = "";
        conn.IntegratedSecurity=false;       
        for (int i = 0; i < report.Database.Tables.Count; i++)
        {
            myTable = report.Database.Tables[i];       
            myLog = myTable.LogOnInfo;         
            myLog.ConnectionInfo = conn;       
            myTable.ApplyLogOnInfo(myLog);     
            myTable.Location = myLog.TableName;  
        }    


       
//        report.SetDatabaseLogon("sa", "", "db", "Shriraj",true);
//        report.SetDataSource(ds);
        CrystalReportViewer1.ReportSource = report;
        CrystalReportViewer1.RefreshReport();

    }