RadGrid stop functionality when page create dynamically

[daniel derakhshani]

When I create new Reflected instance of my usercontrol(page) that contains RadGridView, GridView stop its functionality such as sorting,grouping,etc.
this UserControl works fine when I use the normal construction or constructed by MEF.

My code is as follow:
(UIElement page)
 Type t=page.GetType();
 page=t.Assembly.CreateInstance(t.FullName) as UIElement;

I'm using 2010 Q3