DataGridView in inherited Form

I have a class hiearchy like this:

public class Form1: Form
{
protected DataGridView dataGridView;
}

public class Form2: Form1
{

}

In design mode I cannot change properties of dataGridView for class Form2.
Items in Properties window are "grayed" and dataGirdView component is
locked. What' wrong?

The designer can't access protected properties.