telerik rad toolbar disappear when clicking on buttin inside

[xzerorj]

When I click on a button inside telerik toolbar. This toolbar is disappeared and doesn't fire the event handler in serverside. What's the problem here? \[code\]<CommandItemTemplate> <telerik:RadToolBar ID="gdGridToolBar" Width="100%" Skin="Office2007" OnClientButtonClicking="ToolBarClicked" OnButtonClick="gdGridToolBar_OnClick" runat="server"> <Items> <telerik:RadToolBarButton ToolTip=" <%$ Resources:GlobalResources, ShowAll%>" runat="server" Value="http://stackoverflow.com/questions/13840638/ShowAll" ImageUrl="<%$ Resources:Images, ShowAll%>"> </telerik:RadToolBarButton> <telerik:RadToolBarButton runat="server" Enabled="False" Text="|" /> <telerik:RadToolBarButton ToolTip="<%$ Resources: GlobalResources,ExportToExcel %>" runat="server" Value="http://stackoverflow.com/questions/13840638/Excel" ImageUrl="<%$ Resources:Images, Excel%>"> </telerik:RadToolBarButton> <telerik:RadToolBarButton ToolTip="<%$ Resources: GlobalResources,ExportToExcelML %>" runat="server" Value="http://stackoverflow.com/questions/13840638/ExcelML" ImageUrl="<%$ Resources:Images, ExcelML%>"> </telerik:RadToolBarButton> <telerik:RadToolBarButton ToolTip="<%$ Resources: GlobalResources,ExportToWord %>" runat="server" Value="http://stackoverflow.com/questions/13840638/Word" ImageUrl="<%$ Resources:Images, Word%>"> </telerik:RadToolBarButton> <telerik:RadToolBarButton ToolTip="<%$ Resources: GlobalResources,ExportToCSV %>" runat="server" Value="http://stackoverflow.com/questions/13840638/CSV" ImageUrl="<%$ Resources:Images, CSV%>"> </telerik:RadToolBarButton> <telerik:RadToolBarButton ToolTip="<%$ Resources: GlobalResources,ExportToPDF %>" runat="server" Value="http://stackoverflow.com/questions/13840638/PDF" ImageUrl="<%$ Resources:Images, PDF%>"> </telerik:RadToolBarButton> </Items> </telerik:RadToolBar></CommandItemTemplate>\[/code\]