BOAC

I recently downloaded a nice C-133 Cargomaster for fs2004. It looks and flies great, however when I go to shutdown the engines (ctrl / shift / F1), the propellers continue to spin even though I can hear that the engines have spooled down. I have re-loaded the flight with no changes. Does anyone have any ideas?I do have one other aircraft a B-36 Peacemaker, again looks and flies great. This aircraft has piston engines and jets. The piston engines spool down and the props stop, but the jet engines do not stop completely, in that I can hear them spooling down to say 10%, and then they remain at that level without shutting down completely. I find this to be very irritating! I want props and jets to stop completely!