fckconfig.js not updating

Hi all, I have just started to use FCKeditor and it's great

What I am haveing trouble with is removing buttons and updating the fckconfig.js file. I have changed these:

FCKConfig.SkinPath = FCKConfig.BasePath + 'skins/office2003/' ;

and

FCKConfig.ToolbarSets["Default"] = [
['Source','DocProps','-','Save','NewPage','Preview','-','Templates'],
['SpellCheck'],
['Undo','Redo','-','Find','Replace','-','SelectAll','RemoveFormat'],

but that doesn't seem to have any effect in the editor displayed.

What have I missed? The file has updated on my site and I tried restarting FF and even opening IE to look at it but still no change.

Please help.

Cheers,
Colin