Here are some issues I can notice in your code:
- you always set the same TargetCotnrolID to every tooltip you create. I suppose that you should pass the ID of the control you wish to target (but that may vary according yo your scenario and needs)
- if you pass the ID you need to set the tooltip's IsCilentID property to false, as this would be the server ID which is changed by the framework when in a naming container. You could pass the ClientID of the target element and keep the IsClientID to true.
- you do not give an ID to the ToolTip, you do not set a HideEvent and the RelativeTo property
Please try setting all the necessary properties and especially the correct TargetControlID you need and see if that helps.
the Telerik team