Newbie with dumb newbie question

[Aseph]

I'm making a level with a door that refuses to open all the way. Ceiling and floor height are both 72. It opens right to about where the player's head is, and then stops. I tried adjusting the ceiling and floor height, doesn't help. What am I doing wrong?

[Super Jamie]

Doors do not open to the ceiling, they open 4 units beneath the lowest adjacent ceiling.

If you want the door to vanish into the roof, use Switch Once Ceiling to Highest Ceiling, tag the line and the door sector with the same number.

Post your pwad if you have no luck.