Web user control - Server.execute

[Gvnn]

Good Morning,
I have a little problem with User control and Server.Execute method. This is
my code:

//Load Top of the Page
this.Controls.Add(LoadControl("/controls/HeaderHTML.ascx"));
//Load Body
Server.Execute(strPageUrl);
//Load Bottom of the page
this.Controls.Add(LoadControl("/controls/FooterHTML.ascx"));

The problem is that the runtime execute before the server.execute statement
and then the load the control.
How can i solve it?

Thanks

GvnnRulez