place a level change trigger at the beginning of the 2nd map... I dont have experience with then yet... but I know you need that one so that the map change trigger from map # 1 knows to put the player there in map # 2. Fidgit with the options untill you have it to your liking. Also put an info_player_start in so if you choose to load the map via console, you end up there.
Edit: lol, penguin, we posted at the same time