Hi,
I have problem that, my control in updatePanel always postback upon any server side event. It works previously.
I compare my latest aspx with prior and found that, the only difference is, I was using asp:TextBox; now I am using cc1:MyNumericTextBox.

MyNumericTextBox is actually just a subclass of ASP.NET TextBox. I suspected the System.Web.Extensions only "extend" controls under System.Web.UI, but not mine.

Any ideas how to resolve this?

Thank you