Error: 1172: Definition as3ui:UIObject could not be found

1

Hi,

I am using the following code from the link below which gives errors. How to solve it?

http://snipplr.com/view.php?codeview&id=18332

1172: Definition as3ui:UIObject could not be found.
1172: Definition as3ui.events:UIEvent could not be found.

Code:

 
package {
 import flash.display.Sprite;
 import flash.display.StageAlign;
 import flash.display.StageScaleMode;
 import flash.events.MouseEvent;
 
 import gs.TweenLite;
 import gs.plugins.SetSizePlugin;
 import gs.plugins.TweenPlugin;
 public class Main extends Sprite
 {
  private var m_body:Sprite;
  
  public function Main()
  {
   stage.scaleMode = StageScaleMode.NO_SCALE;
   stage.align = StageAlign.TOP_LEFT;
   
   TweenPlugin.activate([SetSizePlugin]);
   
   m_body = new Sprite();
   
   for( var i:int; i<16;i++)
   {
    m_body.addChild( new Item() ).x = i * Item.WIDTH;
   }
   stage.addEventListener(MouseEvent.MOUSE_MOVE,mouseMoveHandler);  
   addChild(m_body); 
  }
  
  private function set scroll(a_val:Number):void
  {
   var index:int = Math.round((m_body.numChildren-1)*a_val);
   var item:Item;
   var speed:Number = .15; 
   for ( var i:int; i<m_body.numChildren;i++)
   {
    item = m_body.getChildAt(i) as Item;
    TweenLite.killTweensOf(item);
    
    item.visible = true;
    
    switch(i)
    {
     case index:
     TweenLite.to(item,speed,{x:i*Item.WIDTH,setSize:{width:Item.WIDTH*.8, height:Item.HEIGHT*.8}});
     break;
     
     case index -1:
     TweenLite.to(item,speed,{x:i*Item.WIDTH+Item.WIDTH*.2*.5 + Item.WIDTH*.37*.5,setSize:{width:Item.WIDTH*.63,height:Item.HEIGHT*.63}});
     break;
     
     case index -2:
     TweenLite.to(item,speed,{x:i*Item.WIDTH+Item.WIDTH*.2*.5 + Item.WIDTH*.37 + Item.WIDTH*.5*.5,setSize:{width:Item.WIDTH*.5, height:Item.HEIGHT*.5}});
     break;
     case index -3: 
     TweenLite.to(item,speed,{x:i*Item.WIDTH+Item.WIDTH*.2*.5 + Item.WIDTH*.37 + Item.WIDTH*.5 + Item.WIDTH*.61*.5 ,setSize:{width:Item.WIDTH*.39, height:Item.HEIGHT*.39}});
     break;
     case index -4: 
     TweenLite.to(item,speed,{x:i*Item.WIDTH+Item.WIDTH*.2*.5 + Item.WIDTH*.37 + Item.WIDTH*.5 + Item.WIDTH*.61 + Item.WIDTH*.75*.5,setSize:{width:Item.WIDTH*.25, height:Item.HEIGHT*.25}});
     break;

     case index +1:  
     TweenLite.to(item,speed,{x:i*Item.WIDTH-Item.WIDTH*.2*.5 - Item.WIDTH*.37*.5,setSize:{width:Item.WIDTH*.63,height:Item.HEIGHT*.63}});
     break;
     case index +2: 
     TweenLite.to(item,speed,{x:i*Item.WIDTH-Item.WIDTH*.2*.5 - Item.WIDTH*.37 - Item.WIDTH*.5*.5,setSize:{width:Item.WIDTH*.5, height:Item.HEIGHT*.5}});
     break;
     case index +3: 
     TweenLite.to(item,speed,{x:i*Item.WIDTH-Item.WIDTH*.2*.5 - Item.WIDTH*.37 - Item.WIDTH*.5 - Item.WIDTH*.61*.5 ,setSize:{width:Item.WIDTH*.39, height:Item.HEIGHT*.39}});
     break;
     case index +4: 
     TweenLite.to(item,speed,{x:i*Item.WIDTH-Item.WIDTH*.2*.5 - Item.WIDTH*.37 - Item.WIDTH*.5 - Item.WIDTH*.61 - Item.WIDTH*.75*.5,setSize:{width:Item.WIDTH*.25, height:Item.HEIGHT*.25}});
     break;
     default:
     item.visible = false;
//     TweenLite.to(item,speed,{x:i*Item.WIDTH,setSize:{width:Item.WIDTH, height:Item.HEIGHT}});
     //TweenLite.to(item,speed,{x:i*100,setSize:{width:50, height:50}});
     break;
    }
   }
   
   TweenLite.to(m_body,speed,{x:(stage.stageWidth*.5)-Item.WIDTH*index});
   
  }
  
  
  private function mouseMoveHandler(e:MouseEvent):void
  {
   scroll = e.stageX/stage.stageWidth;
  }
 }
}
import as3ui.UIObject;
import as3ui.events.UIEvent;
import flash.events.Event;
import flash.display.Sprite;
internal class Item extends Sprite
{
 public static const WIDTH:Number = 140;
 public static const HEIGHT:Number = 257;
 private var m_color:uint;
 public function Item()
 {
  m_color = uint( Math.random()*0x1000000);
  setSize(WIDTH,HEIGHT);
 }
 
 public function setSize(a_width:Number,a_height:Number):void
 {
  with(graphics)
  {
   clear();
   beginFill(0xFFF000,.1);
   drawRect(-a_width*.5,0,a_width,a_height);
   endFill();
   beginFill(m_color,.1);
   drawRect(-a_width*.5+1,1,a_width-2,a_height-2);
   endFill();
  }
 }
 
}