Why won't my level door work?

[Redneb27]

Goodness, I have spent about 3 weeks trying to figure this out on my own. When I go through my level door, my game crashes. I set the start position, the map location, I put a player start on the next map, I don't know what's wrong.

Is there some specific way to set up the hps file for one of the maps? Because the rest is done right. At least according to 3 dozen youtube videos.