[Typo3] RTE configuration has no effect

[Courcy Michael]

Hi list,

I use typo3 3.8 and put this TS config code in the root page of my site
RTE.classes { 
    green {
       name = green text
       value = font: 11px; color: #006600;
     }  
    orange {    
       name = orange text
       value = font: 11px; color: #FF9900;
    }
}
This action just have no effect in my RTE when I try to see a change in 
the Paragraph Style

Did I forget something.