Instantiating my class, from a folder? "Cannot open a protected movie."?

programming flash
1

[FONT=Times New Roman][SIZE=3]I’ve been looking through documentation, and on the forums, and am hopelessly confused with some of the new things in AS3. I have tried include, import, and class paths to no avail. Anyway…[/SIZE][/FONT]

[SIZE=3][FONT=Times New Roman]Folder1 est.fla // test fla[/FONT][/SIZE]
[FONT=Times New Roman][SIZE=3]Folder1\Scripts\PhysicsEngine.as // class[/SIZE][/FONT]

[FONT=Times New Roman][SIZE=3]Class AS file:[/SIZE][/FONT]

 class PhysicsEngine {
            private var age:int;
 
            public function PhysicsEngine(newAge:int) {
                        age = newAge;
                        trace("PhysicsEngine created.");
                        trace("age = " + age + ".");
            }
}

[FONT=Times New Roman][SIZE=3]…and…[/SIZE][/FONT]

[FONT=Times New Roman][SIZE=3]test fla, frame 1:[/SIZE][/FONT]

var myEngine:PhysicsEngine = new PhysicsEngine(10);

[FONT=Times New Roman][SIZE=3]Just what is wrong with this code? I have a class path set up which is supposed to be importing the “Scripts” folder into frame 1.[/SIZE][/FONT]

[FONT=Times New Roman][SIZE=3]I also get a nasty error: Cannot open a protected movie.[/SIZE][/FONT]