customconfig -specify the toolbarset to use?

Using the dotnet version.
Is it possible to specify which toolbarset to use in the config.js file?
I have a MyEditorConfig.js file which works OK except the line where I try to specify which toolbarset to use.
////////////////MyEditorConfig.js////////////////
FCKConfig.ForcePasteAsPlainText = true ; //this works OK

FCKConfig.ToolbarSet = 'MyNewSet';//this doesnt work!! seems to do nothing !!
/////////////////////////////////////////