Shoutbox

hello.
today i've tryed to show the "Hello World" window explained in the Scripting Documentation.
I've saved the xml file as "windows.xml" and i've written this code:

code:

---

function OnEvent_Initialize(MessengerStart)
{
    Wnd = MsgPlus.CreateWnd("windows.xml", "WndTest");
}

---

but it doesn't show the window and returns null.
What's the problem?
Thaks to all.
P.S.: Sorry for my bad english.