Changing the ToolbarSets but not refreshing

Ok, it's quite simple, i don't know why but im changing the ToolbarSets Basic setting to:

FCKConfig.ToolbarSets["Basic"] = [
   ['Source','Bold','Italic','-','OrderedList','UnorderedList','-','Link','Unlink']
] ;

And uploading the file, of course, but it stills show the default basic settings.
Do i have to change something else?. I just added the Source button, and it's not showing.

Thank you everyone.