Failed to load viewstate. The control tree into which viewstate must match.

I have a GridView control. When I move the GridView control to another page, I get this error:

Server Error in '/' Application.

Failed to load viewstate. The control tree into which view开发者_StackOverflow社区state is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.

How do I tackle with this problem?

Thanks in advance.

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