My slideshowextender is not changing the images what should i do

I have a dynamic slide show on my website but it is not changing the images plzz help

my code for html::

<%@ Page Title="" Language="C#" MasterPageFile="~/Site1.Master" AutoEventWireup="true" CodeBehind="Garba_competition.aspx.cs" Inherits="spandan.Garba_competition" %>

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>

<asp:Image ID="Image1" runat="server" />
<asp:SlideShowExtender ID="Slideshowextender1" runat="server"
Loop="true"
PreviousButtonID="prevButton"
AutoPlay="true"
SlideShowServiceMethod="GetSlides"
NextButtonID="nextButton"
PlayButtonID="playButton"
TargetControlID="Image1"

PlayButtonText="Play"
StopButtonText="Stop"
UseContextKey="True" />

<asp:Button runat="Server" ID="prevButton" Text="Prev" Font-Size="Medium" />
<asp:Button runat="Server" ID="playButton" Text="Play" Font-Size="Medium" />
<asp:Button runat="Server" ID="nextButton" Text="Next" Font-Size="Medium" />

</asp:Content>

and code for aspx.cs page::

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

namespace spandan
{
public partial class Garba_competition : System.Web.UI.Page
{
DataConnect obj
= new DataConnect();

protected void Page_Load(object sender, EventArgs e)
{


loadslide();

}

protected void loadslide()
{
string q = "SELECT * FROM Image_master";
DataSet ds2;
ds2 = new DataSet();
ds2 = obj.LoadData(q);

if (ds2.Tables[0].Rows.Count > 0)
{
AjaxControlToolkit.Slide[] slides = new AjaxControlToolkit.Slide[ds2.Tables[0].Rows.Count];

for (int i = 0; i < ds2.Tables[0].Rows.Count ; i++)
{

DataRow dr = ds2.Tables[0].Rows[i];
slides[i] = new AjaxControlToolkit.Slide();

// SlideShowExtender.SlideShowServiceMethod="Getslides(Convert.ToString(i))";

if (ds2.Tables[0].Rows.Count > 0 )
{
Image1.ImageUrl = ds2.Tables[0].Rows[i]["Image_url"].ToString();
}

}

//SlideShowExtender1.slides() = ds2.Tables[0];
// SlideShowExtender1.DataBind();

}
}

}
}