If you have done that, make sure that you have added this into your map's .gsc file:
(Replace the word in speech marks to your zone, the next zone, and then the same zone as the second but with "enter_" in front of it.
add_adjacent_zone( "zone_name", "next_zone", "enter_next_zone" );
Make sure the zones have the correct KVPs added to them, or they won't work.
Also make sure that your door and trigger KVPs are correct.
Use these tutorials to help you with adding zones: