[Newbies] Image not locking down

[joe biggins]

Hi,

I am using squeak 4.1.  Ive put Preferences
disableProgrammerFacilities in my World menu, done it, confirmed it
and saved to a new image name, all that has happened is that the
keyboard commands have stopped but the Halo and debugger are still
alive and kicking!  Could anyone tell me how to disable the halo, and
the flaps.

Many thanks