Included Tutorial problem

I just purchased T2D and have gone through the basic tutorial. It was pretty easy scripting as I have already worked with Fastgraph and some Direct X. But I did have one problem. The background only covers about 60% of the screen. It scrolls correctly, but does not reach the top and the bottom. Ships show up in these areas but no particle affects. I played with settings, I can move the screen up, down and resize the clouds, but cant figure out how to stretch the sky to cover the whole background. Has any one else see this issue. or did i just miss something?
thanks
Scott

Here is the create tile map function

function CreateTileMap()
{
// Create tile-map.
%scrollerMap = new fxTileMap2D() { scenegraph = t2dSceneGraph; };

// Load saved tile-map file.
%scrollerMap.loadTileMap("~/client/maps/scroller.map");

// Load tile layer from tile-map
%skyLayer = %scrollerMap.getTileLayer( 0 );

// Generate Scrolling Sky, re-size to fill the whole screen
%skyLayer.setPosition( "0 -10" );
%skyLayer.setTileSize( "25 25" );
%skyLayer.setWrap( true, false );
%skyLayer.setAutoPan( "10 0" );
}