Hi, i believe the problem is about having diferent maps.
I'm not sure but i believe you need to have all the maps on "map1" placed together, i tried it and could apply the texture using "map1".
I was doing a model to be be able to be used on a game, and my teacher told me i should put all the diferent maps together on map1, and i've seen that in some texture files for games, but i'm not sure, so maybe wait for other answers, in the meanwhile you can try to sort the diferent maps into the same one.