I've created my first nav menu using Flash - hooray!
The nav menu items are invisible buttons with movies beneath them.

It all works fine in terms of navigating the site.

However, I would like to make it accessible (i.e. have shortcut / access key
assignments, and tabindex).
I filled out the appropriate fields in the accessibility panel, and the
shortcuts & tabbing don't work, either in IE7 or Firefox 2.

I did a bit of research on google, and what I read suggested that certain
components (invisible buttons included) cannot be made accessible.

Is that correct?

btw, I'm using Flash MX Pro.