Ajax problem.

<asp:UpdatePanel ID="UpdatePanelUploadArea" runat="server" UpdateMode="Conditional">
            <ContentTemplate>
                <div id="UploadArea">
                    <table>
                        <tr>
                            <td>
                                Caption of Image:
                            </td>
                            <td>
                                <asp:TextBox ID="txtName" runat="server" MaxLength="150"></asp:TextBox>
                            </td>
                        </tr>
                        <tr>
                            <td>
                                Browse Image:
                            </td>
                            <td>
                                <asp:FileUpload ID="FileUpload1" runat="server" />
                              <%--  <asp:CustomValidator ID="valFileSize" runat="server" ErrorMessage="The image exceeds 1 MB"
                                    OnServerValidate="valFileSize_ServerValidate" Display="Dynamic" />
                                <asp:CustomValidator ID="valFile" runat="server" ErrorMessage="No file uploaded"
                                    OnServerValidate="valFile_ServerValidate" Display="Dynamic" />
                                <asp:CustomValidator ID="valFileType" runat="server" ErrorMessage="This isn't not an image"
                                    OnServerValidate="valFileType_ServerValidate" Display="Dynamic" />--%>
                            </td>
                        </tr>
                    </table>
                </div>
                &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
                <asp:Label ID="lblResult" runat="server" ForeColor="#0066FF"></asp:Label>
                <p>
                    <asp:Button ID="UploadButton" runat="server" Text="Upload Now" OnClick="UploadButton_Click" />
                </p>
            </ContentTemplate>
            <Triggers>
                <asp:PostBackTrigger ControlID="UploadButton" />
            </Triggers>
        </asp:UpdatePanel>

                                  

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