Horizontal drop down menu not staying open?

Question

Hi there again,
So now I'm attempting to create a horizontal drop down menu. It is meant to be a vertical tab that sticks out, expands to the right, then expands and drops down.
However, when I hover over the button (which is the blue box) and click it, Flash thinks I'm clicking the button on the bottom. The technique I used to do it must be the problem. I'm using a button inside a button. (In place of the "over" state of my buttons, I have inserted a movie clip of which in itself are layers). I've tried so many things to try to make it work to no avail.
There must be an easier way to accomplish what I am doing...but as I've said before, I'm noob and experimenting.
The link to the uploaded .swf file is below. It isn't the final file, but it is a small sample of what I am trying to accomplish with the navigation.
http://www.swfcabin.com/open/1354160938
Thanks!

Answer 1

When you roll over the purple rectangle, it expands to the right. You have to move the cursor to the right to get the rectangle to expand down, exposing the blue rectangle. The problem that you see when you roll over the blue rectangle is because the rollover on the blue rectangle causes a rollout on the object below and this causes the rectangle below to shrink up.
You can control this, but you'll need to use Actionscript to achieve the effect. Here's a link to one way: http://www.senocular.com/pub/kirupa/as3tips_p6.html.