as3 tween

Hi,

I am news to actionscript and am trying to create a flash banner. I tried following an online tutorial which said to use the following code:

import fl.transitions.;
import fl.transitions.easing.
;

// apply wipe transition
TransitionManager.start(img1_mc, {type:Wipe, direction:Transition.IN, duration:2, easing:None.easeNone, startPoint:1});

when i try this and run the movie though, the movie clip doesnt move and i am given the following error:

1067: Implicit coercion of a value of type Class to an unrelated type flash.display:MovieClip.