Problems enabling antialiasing

Hello,
It seems I can't enable antialiasing in self created window,
I tried everything, including "Anti aliasing" in mics window params, in render system params like this:
Mogre.Root.Singleton.GetRenderSystemByName("Direct3D9 Rendering Subsystem").
SetConfigOption("Anti aliasing", "NonMaskable 1");

But It look like if I write
root.Initialise(false);
anti aliasing will be off by default.
How can I enable it?

See this post

thanks:)