facebook ultimate shortcode not working in widget

hi there,

could you please help me with the facebook login button shortcode - I really want this to display in sidebar but is not working when I paste the shortcode into text widget. only the actual shortcode text shows up. if I can't change this - I atleast want to hide the facebook login widget once a user has logged in as I much prefer the look of my theme's user details once logged in. how can I do either (or both) of these please?

thanks