Bind Nested GridView with AutoGenerateColumns true in ASP.Net

Hello,

I need create Nested GridView in ASP.NET using C#.

This is the tutorial http://www.dotnetfox.com/articles/nested-gridview-in-Asp-Net-using-C-Sharp-1011.aspx

My problem is when set AutoGenerateColumns property of the first GridView

If setting on GridView is AutoGenerateColumns="True" the return is enter image description here

Instead if setting on GridView is AutoGenerateColumns="False" the return is enter image description here

I need set AutoGenerateColumns property True always

I can't have a Nested GridView if I use AutoGenerateColumns="True"?

Thanks in advance for help.