XML bind problem in a GridView ? [Resolved]

Hi,
I am trying to update the page using AJAX but its not working. I have a Dropdownmenu . On selection of the item in the Dropdownmenu , i am trying to bind the values in a Repeater control . But i dont want any postback to occur so everything is inside the update panel.

<asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:UpdatePanel ID="GenrePanel" runat="server">
            <ContentTemplate>
                <div class="columnheader">
                    Music News:
                    <asp:DropDownList ID="Genres" runat="server" AutoPostBack="True" OnSelectedIndexChanged="Genres_SelectedIndexChanged">
                        <asp:ListItem Text="Rock" Value="RockFeed.xml" Selected="true" />
                        <asp:ListItem Text="Jazz" Value="JazzFeed.xml" />
                        <asp:ListItem Text="Blues" Value="BluesFeed.xml" />
                    </asp:DropDownList>
                </div>
                <asp:Repeater ID="GenreNews" runat="server" DataSourceID="GenreSource">
                    <ItemTemplate>
                        <div class="newshead">
                            <asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl='<%#XPath("link") %>' Text='<%#XPath("title") %>' />
                            &nbsp;
                            <asp:HyperLink ID="HyperLink2" runat="server" NavigateUrl='<%#XPath("link") %>' Text="[read more]" />
                        </div>
                    </ItemTemplate>
                </asp:Repeater>
                <hr />
                Last Updated:
                <%= DateTime.Now.ToLongTimeString() %>
                <asp:XmlDataSource ID="GenreSource" runat="server" DataFile="RockFeed.xml"
                    XPath="RockFeed"></asp:XmlDataSource>
            </ContentTemplate>
        </asp:UpdatePanel> 

The code behind file contains the following code:-

protected void Genres_SelectedIndexChanged(object sender,EventArgs e)
        {
            UpdateGenre();
        }

        private void UpdateGenre()
        {
            GenreSource.DataFile = Genres.SelectedValue;
            GenreNews.DataBind();
        } 

I am depicting one of the xml file:-

<?xml version="1.0" encoding="utf-8" ?>
<RockFeed>
  <option1>Rock1</option1>
  <option2>Rock2</option2>
  <option3>Rock3</option3>
  <option4>Rock4</option4>
  <option5>Rock5</option5>
</RockFeed> 

please any help is appreciated..

Thanks and Regards
Akiii

[Resolved]