[flexcoders] StyleName property ignored : when precisely and workarround ?

[carnau...@ymail.com]

Hello,

I have noticed that the following "quite simple CSS" may be ignored depending 
on our MXML structure...? :

.myBytton {
   color: #111111;
}

Button {
   color: #222222;
}

Both CSS styles are ignored below :
<mx:Button styleName="myButton" .../> // color #111111 ignored
<mx:Button .../> // color #222222 ignored
=> and default color for <mx:Button> gets displayed :-(

Does anyone know about this issue ?  and how to workarround it ?

With thanks,

Regard.

PS : config. is "AIR application run on WinXP via Flex Builder 3"