Custom Cursor

I am trying to create a custom cursor in lieu of the default arrow.

It works fine until I call cursorOff() and then ceases to work. As soon as a I display then hide the console and the cursor reappears it works fine. What am I doing wrong?

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function setupT2DScene()
{
// Create fxSceneGraph2D.
new fxSceneGraph2D(t2dSceneGraph);

// Associate Scenegraph with Window.
sceneWindow2D.setSceneGraph( t2dSceneGraph );

// Set Camera Position to be centered on (0,0) with
// view width/height of (100/80).
sceneWindow2D.setCurrentCameraPosition( "0 0 100 75" );
sceneWindow2D.setUseMouse( true );

loadImages();
createCursorSprite();
cursorOff();
}

function createCursorSprite()
{
$cursor = new fxStaticSprite2D() { scenegraph = t2dSceneGraph; };
$cursor.setImageMap(cursorImageMap);
$cursor.setSize( "5 5" );
}

function loadImages()
{
datablock fxImageMapDatablock2D(cursorImageMap)
{
mode=full;
textureName = "~/client/images/crossHair";
};
}

function sceneWindow2D::onMouseMove( %This, %Modifier, %WorldPosition, %MouseClicks )
{
%x_pos = getWord(%WorldPosition,0);
%y_pos = getWord(%WorldPosition,1);

$cursor.setPosition(%x_pos SPC %y_pos);
}