[flexcoders] TLF 3.0 - How to make focusOut-highlighted text becomes unhighlighted?

[handitan]

Hi all,

I am using the latest TLF 3.0 with Flex 3.6 SDK.
To make the text stays highlighted when it's out of focus, I have to do this:
var config:Configuration = TextFlow.defaultConfiguration; 
config.unfocusedSelectionFormat = new SelectionFormat(0xffffff, 1.0, 
BlendMode.DIFFERENCE, 0xffffff, 1.0, BlendMode.DIFFERENCE, 0);

There's a time when I want it those highlighted text to become unhighlighted.
I thought it would be simple by just doing this on the textFlow:
_textFlow.unfocusedSelectionFormat = new SelectionFormat(0xffffff, 0, 
BlendMode.DIFFERENCE, 0xffffff, 0.0, BlendMode.DIFFERENCE, 0);
But it doesn't work.. It just stays highlighted.

Is it because it's being overridden by the defaultConfiguration all the time?

Thanks!

Handi