Steps to follow:

• Open a new flash file (Ctrl+N).
  New Document window will appear
  Select General panel and choose Type: Flash Document . Press OK.
• If your timeline window is not open, press (Ctrl+Alt+T).
• Now you can see a single Layer called "Layer1" in your timeline Window.
  
  
• Create a Shape Tween on Layer1. Similar to the one in Shape Tween Tutorial.
• Single click on add new layer button.
  
  
• A new layer gets added. By default it will be named "Layer 2".
• Create a Motion Tween on Layer 2. Similar to the one in Motion Tween Tutorial. After creating two layers, your timeline will look something like the one shown below.
  
  
  
• Now press (Ctrl+Enter) to view your motion tween.