Problem with Import and Base Object

Question

Hi everyone
Last week, I downloaded Flash CS5. I am trying different thing and here is the problem that I dont understand
I wrote a package like that
package {
    import flash.text.TextField;
    import fl.controls.Button;
    public class ex1 extends Sprite {
        public function ex1() {
           var myButton:Button = new Bu
tton();
            var label:TextField         = new TextField();
            addChild(label);
If I try to execute that script, the compiler returns error
1046: Type was not found or was not a compile-time constant: Button.
1180: Call to a possibly undefined method Button.
If I insert in the main stage (with the Componet Editor) a Button in the main stage, and recompile it, no error.
If I delete the Button in the main stage and recompile again, no error
But, If I save the projet and reload it again, I've got the same error
By the way, I dont have any problem with the textField()
What is wrong with my setup.
OTHER QUESTION:
If in the ACTION FRAME (F9), I insert the folowing code:
import ex1;
var a:ex1 = new ex1();
one more time, I've got error from the compiler. Why ?
We cannot include a package in the ACTION FRAME ?
Thanks for your help

Answer 1

There are some things (including $.fileName) that just do not work in jsxbin's.
I don't thing the exception hook will work either.
Either use an ini file in a well known location (~/Desktop) or make sure your
files are put in Presets/Scripts. That location can be determined with this bit
of code:
var SCRIPTS_FOLDER =
new Folder(app.path + '/' +
localize("$$$/ScriptingSupport/InstalledScripts=Presets/Scripts"));
-X