Trouble with plugin (Switchtoolbar)

I'm trying to install the Switchtoolbar plugin and am getting an alert: Unknown toolbar item "Switchtoolbar." I've followed the readme and am not sure what to try next.

My menu (the basic one only, the full menu is similar):

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

My plugin section of fckconfig.js:

//----------------------------------------------------
// Switchtoolbar plugin 
FCKConfig.Plugins.Add('Switchtoolbar', 'en,ru,uk');
// *** The Switchtoolbar cycle toolbars. These are not checked, so
// * if you specify an invalid toolbar, the editor will crash
FCKConfig.SwitchtoolbarCycle = ['Default','Basic'];

The setup section in Switchtoolbar's fckplugin.js:

// Register the related command.
// RegisterCommand takes the following arguments: CommandName, DialogCommand
FCKCommands.RegisterCommand( 'Switchtoolbar', new FCKCommand_Switchtoolbar() ) ;

// Create the toolbar button.
// FCKToolbarButton takes the following arguments: CommandName, Button Caption
var oSwitchtoolbarItem = new FCKToolbarButton( 'Switchtoolbar', FCKLang.SwitchtoolbarBtn ) ;
oSwitchtoolbarItem.IconPath = FCKPlugins.Items['Switchtoolbar'].Path + 'Switchtoolbar.gif' ;
FCKToolbarItems.RegisterItem( 'Switchtoolbar', oSwitchtoolbarItem ) ;

If anyone can help me out I'd greatly appreciate it.