Toolbar Problem: What am I missing?

If you are using config.js file you have to set

CKEDITOR.editorConfig = function( config )
{
   config.toolbar = 'Basic';
};

If you are using special config in replace function you have to set

    CKEDITOR.replace( 'yourTextareaName', {
        toolbar : 'Basic'
    });

Alternativly you can take a look at /_samples/api_dialog.html file.