Help with auto activating buttons ..?

Hi all

I'd like to try auto-activating a button, to link through to a second menu automatically on button selection. I've set it up as it appears it should be, selected the button, set auto-activate, previewed - and nothing happens - that is, selecting the desired button does not autoacitvate it, though it will work if clicked ... I've repeated this with different buttons and menus - same results, no joy.

What obvious mistake might I be making?

Anyone having success with auto activated buttons? Any tips on what I might try / might be overlooking ..?

Thanks for any ideas - bunging adobe