Button lnks don't work?

Question

For some reason I can't get my buttons to link to a URL. The file was created in Flash CS3 and I'm working in CS4.  I'm still a newbee. Seems by the time I finally figure Flash out, it's time to learn it all over again. Getting familiar with AS, but still have along way to go. Anyway when I apply either these scripts to a button the url launches without ceremony or not at all when I preivew it. Probably something brain dead, I'm sure.
AS2
.onRelease = function() {
    getURL("http://www.http://www.linkedin.com/connections?trk=hb_tab_cnts.com");
AS3
linkedBtn.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
function mouseDownHandler(event:MouseEvent):void {
navigateToURL(new URLRequest("http://www.http://www.linkedin.com/connections?trk=hb_tab_cnts.com));
Errors:
Line 2 – The class or interface 'MouseEvent' could not be loaded.
Line 1 – Statement must appear within on handler
Thanks!
Bill

Answer 1

I can totally understand how you can lose it with idiots like me. We mean you no harm, honest. So you know, I am applying this code to the buttons not the frame and this was probably first authored in either MX 2004 or Flash 8. Does Flash CS4 open as AS3 by default?
Tried this:
face_btn.onRelease = function() {
    getURL("http://www.http://www.linkedin.com/connections?trk=hb_tab_cnts.com");
Line 1 – Statement must appear within on handler
Don't I need a function to call on here? What do I need to tell it what to do?
Then this:
face_btn.on (release) {
      getURL("http://www.http://www.linkedin.com/connections?trk=hb_tab_cnts.com");
Line 1 – Expected a field name after '.'  operator.�
Even tried this.
face_btn.onRelease = function() {
     getURL("http://www.facebook.com/#!/profile.php?id=1208936702","_blank","GET");