Lock mouse don't work????

Hi
i want to ask
how to lock mouse in my window game?
i use lockmouse / setlockmouse
but it didn't work
here is my script

function startGame(%level)
{exec("./beelevel.cs");
Canvas.setContent(mainscreenGui);


Canvas.setCursor(DefaultCursor);
$wind=scenewindow2d;
Canvas.hideCursor();
moveMap.push();
sceneWindow2D.setUseObjectMouseEvents( true );


if( isFile( %level ) || isFile( %level @ ".dso"))
sceneWindow2D.loadLevel(%level);
scenewindow2d.setviewlimiton(-100,-105,220,165);

scenewindow2d.mount(mybee,0,0,0,true);

$wind.setlockMouse(true); ==> i tried this
lockMouse(true); ===> and tried this but it don't work all
}

could it be i must install TGE? because i only have TGB
thanks