spark.components.Button in FlashDevelop + Flex SDK 4

Hi,

I'm trying to create a button in FD + Flex SDK

Actionscript Code:

_roomMaker = new Button();
_roomMaker.label = "кнопка";
_roomMaker.x = 100;
_roomMaker.width = 100;
_roomMaker.height = 20;
_roomMaker.y = 100;
_roomMaker.enabled = true;
this.addChild(_roomMaker);

A code like this works great in Flash IDE, but does not in FlashDevelop.
The button just doesn't show up, and I can't get what the problem is

Is it possible to create a button from spark.components.Cutton package this way? :rolleyes: