Flash Scripting not being recognised in Captivate

Dear all, I hope someone can help.

I am placing Flash created sections into a Captivate e-learning module and although my Flash (MX) file works perfectly in Flash (SWF), parts of it stop working when placed within Captivate (CP4)

Quick description. The Flash file is an interactive menu, and I wanted a way of telling the user that they had already visited a section, so I created a "tick" that appeares when the user clicks on the button. I simply set the visibility to "True". on the button action.

The issue is that I have a bit of scripting on the first frame to set the visibility to "False" to turn off all the ticks. This works great as a standalone SWF, but as soon as it goes into Captivate it no longer works.

Here is the script to turn off the ticks...located on the first frame of the movie

this.onEnterFrame = function () {
_root.tick1._visible=false;
_root.tick2._visible=false;
_root.tick3._visible=false;
_root.tick4._visible=false;
_root.tick5._visible=false;
_root.tick6._visible=false;
_root.tick7._visible=false;
_root.tick8._visible=false;
_root.tick9._visible=false;
_root.tick10._visible=false;

}

Here is the script to turn on a tick from a button press. Pressing the button takes the user to a new section, and on entering the section, the tick appears...The script is atached to a frame at the start of a new section....

stop();
this.onEnterFrame = function () {
_root.tick1._visible=true;

}

Any help would be greatly appreciated...