I am using Borderlayout in that North region is collapsed. So i have tooltip for that. but it is not showing.

<ext:Viewport ID="ViewPort1" runat="server">
            <ext:BorderLayout ID="BorderLayout1" runat="server">
                <North Split="true" CollapseMode="Mini" CollapsibleSplitTip="Click to view Notification">
                     <ext:Panel ID="Panel10" runat="server" Title="Notification" Region="North" Collapsible="true"
                          TabTip="Click to view Notification" Collapsed="false" Height="225">
                            <ucNotification:UCNotification ID="Notification" runat="server" />
Above code
TabTip="Click to view Notification"
is not coming and
CollapsibleSplitTip="Click to view Notification"
is not coming.

Kindly give your suggestions.

Thanks in advance