Update progress not working

I have an update progress which works but doesnt show the text or image

<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">
                                            <ProgressTemplate>
                                                Panel1 updating...
                                             
                                            </ProgressTemplate>
                                        </asp:UpdateProgress>   

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
                                         <ContentTemplate>
                                         <asp:Button ID="btnUpload" runat="server" Text="Upload" CausesValidation="true" ValidationGroup="CheckImage" OnClick="btnUpload_OnClick"/>  
                                     
                                        
                                           </ContentTemplate>
                                            <Triggers>
                                        <asp:PostBackTrigger ControlID="btnUpload"  />  
                                         </Triggers>
                                            </asp:UpdatePanel>