[flashpro] Checkbox component

[web at progettoideazione.com]

Hi guys, I just started using flash components and I noticed a strange
behaviour with checkboxes:

I load a symbol from the library with 4 checkboxes in it, and it shows 3
normally, while the 4th has no "box" since I click on it. Then it shows
normally even if i click it again.

I noticed also that if I add one more checkbox, the former shows normally
and the last added shows no box at start.

Any idea? (sorry for my english)