IE7/Firefox keep looping in CS3 (ignores AS3 cmds)

Question

I created an index.html and index.swf and placed them with
the AC_Runactivecontent.js on the server after they worked fine
locally. Now they run fine on the latest Opera and IE6, but with
Firefox (1.5 and 2) and IE7 (WinXp) the flash keeps looping forever
and I cannot touch any of the buttons or controls (also seems to
ignore the AS3 commands including stop();) ?! Please help as I am
new to Flash and CS3 especially. Oh, and it also runs fine on
Vista's IE7
You can check the results at
www.alifcc.com
I'm using the UIScrollBar component, and following is the
actionscript used:
stop();
function oncontactClick(evt:MouseEvent):void {
gotoAndStop("contact");
function onaboutClick(evt:MouseEvent):void {
gotoAndStop("about");
function onsolutionsClick(evt:MouseEvent):void {
gotoAndStop("solutions");
function onclientsClick(evt:MouseEvent):void {
gotoAndStop("clients");
contact_btn.addEventListener(MouseEvent.CLICK,oncontactClick);
about_btn.addEventListener(MouseEvent.CLICK,onaboutClick);
solutions_btn.addEventListener(MouseEvent.CLICK,onsolutionsClick);
clients_btn.addEventListener(MouseEvent.CLICK,onclientsClick);

Answer 1

It turned out to be because of a conflict with the Real
Player 11 Beta plugin.