tabIndex, textfields and movieclips

Hello all,
So I have a fairly straightforward login page that I am trying to set the tab order for. Everything seems to be working fine, the only quirk is when you tab to the first movieclip in the list, you have to use the arrow keys to navigate through the other movieclips until you get to the textfields again. I am wondering how you would be navigate through all the interactive objects with just the tab key?

Thanks in advance.