Problem with Toolbar

I tried to change my Toolbar settings, so i putted this code:

$oFCKeditor->ToolbarSet = 'Admin';

(php)
But when i runed the code an Alert pop-ups and says that the "Admin" Toolbar set dosen't exist.
I puted this code on fckconfig.js so i'm shure that there is an "Admin" Toolbar set:

FCKConfig.ToolbarSets["Admin"] = [
   ['Bold','Italic','Underline','-','Image','Smiley'],
   '/',
   ['Style','FontFormat','FontName','FontSize' ,'TextColor'],
   '/',
   ['JustifyLeft','JustifyCenter','JustifyRight','JustifyFull'],
] ;

What shuld i do?
Thanks.