Quote:
Only one instance of a ScriptManager can be added to the page.
This error occurs when you have more than one
ScriptManager/ToolkitScriptManager
in a page or it is added in the masterpage and its inherited page also contains a
ScriptManager/ToolkitScriptManager
.
You have to use only one
ScriptManager/ToolkitScriptManager
in a page.If the Masterpage contains a
ScriptManager/ToolkitScriptManager
there is no need for another one in its inherited page
Quote:
When I remove scriptmanager,that is fine but is not work
Possible thing is Popup doesn't contains any data.use debugger to find whether the data is binding or not