hello, I used Tooltip referring DEMO of Telerik using ASCX for that and initially it worked but just 2-3 days before, I checked, tool tip doesnt work... I have used RadAjaxManager+RadTooltip+RadAjaxPanel. When I remove Ajax Settings of RadTooltip, it starts giving error "Object reference not set". And When I set those settings, it shows tooltip but hides before showing the content. Please help me out in this....I am in need indeed..!!!!