Select multiple noncontiguous items in Listbox (Mac Air App)

Hello,

I am having problem with a Listbox activity. I created the activity in Flash with actionscript 2. The activiey allows  user to select a number of options from a Listbox. Then I published it as a swf and bring it into Flash builder 4.5 to created an Air app.

I have published the same swf file (embedding in a html page), I can select noncontiguous items in Listbox with the cmd key.

But when I install the Air app and run it, I am no longer able to select noncontiguous items with the cmd key (inside the Air App), or any key at all. I can only select contiguous items with Shift key.

Can anyone please help? Any idea would be much appreciated.

Thank you

Akei