Unity3dstudent Module B08 script

I entered the code exactly and i still get this error.

Code:

#pragma strict
 
 var power : float = 500.0;
 
function Start () {
  rigidbody.AddForce(Vector3(0,0, power));
}

error
Assets/Assets/Scripts/MovableCube.js(3,18): UCE0001: ‘;’ expected. Insert a semicolon at the end.

There isn’t any problem with this code. I copied and pasted and gave no error.
You might created a C# file instead of JavaScript file , or you should copy and paste your assets folder in your project to a new project.