Old Scratchy movie

Hi,
I’m new to this flash and wanted to learn but I got stucked here.

I found this flash tutorial about old scratchy movie:

http://www.flashkit.com/tutorials/Special_Effects/Old_Scra-Black-754/index.php

Tells me to create a movie clip “line” and “actions”

and create a line as big as the movie: 400

Then tells me to put this on the action panel of “actions”

onClipEvent(enterFrame){
 _root.line._x=random(400);
}

I did that and it tells me to test the movie so I did but I get this error:

**Error** Symbol=actions, layer=Layer 1, frame=1:Line 1: Clip events are permitted only for movie clip instances
	 onClipEvent(enterFrame){

Total ActionScript Errors: 1 	 Reported Errors: 1

But I went ahead and did everything but I still get the error. I tried emailing the tutor but I guess its a dead email. Please help. What am I doing wrong?