We are using telerik old version which was using dll of rad controls.Now we are upgrading these controls to latest version of telerik and getting code issue which was not working .
My following code is not working , So please let us know How we can fixed this issue.
<telerik:AjaxLoadingPanel ID="AjaxLoadingPanel1" runat="server" Height="75px" Width="75px">
<img alt="loading..." src="../RadControls/Ajax/Skins/Default/loading6.gif" />
Gives error:Error16 Unknown server tag 'telerik:AjaxLoadingPanel'.