c# visual style

I am using .net 2.0
The project has an mdi and several child forms...
running win xp pro.
I do not get the new visual style in .net 2.0
Any ideas please

This is the code present is Program.cs
static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new CodexMainForm());
}
}