Load UserControls

[Fernando]

Hi
I have a problem following this demo http://demos.telerik.com/aspnet-ajax/tooltip/examples/targetcontrolsandajax/defaultcs.aspx#
i can't load the user control in this code
 private void UpdateToolTip(string elementID, UpdatePanel panel)
        {
            Control ctrl = Page.LoadControl("ProductDetailsCS.ascx");
            panel.ContentTemplateContainer.Controls.Add(ctrl);
            ProductDetailsCS details = (ProductDetailsCS)ctrl;
            details.ProductID = elementID;
        }
 
ProductDetailsCS not found. 
i need your help, may be i doing something wrong.
thk.

[Fernando]

Hi
i solved this problem.
i include my control in the page whith this tag
<%@ Register Src="ctrInfoCartolaFFMM.ascx" TagName="ctrInfo" TagPrefix="uc1" %>
thk  and sorry