View gets its drawable state (pressed, etc...) from its parent

I have a ListView where each list item is a custom layout based on a RelativeLayout, it is clickable and it has a custom selector. En plus, it has a sub-RelativeLayout which is also clickable and it has its own selector.

Something like this:

 ---------------
|               |
|         ___   |
|        |   |  |
 ---------------

Everything works perfectly but the problem is that when I click on the parent relative layout, the child selector assumes the state of the parent selector. I tried to set

android:duplicateParentState="false"

on the child but nothing has changed.

Any idea? Thanks in advance