[HELP] The overall ceil height is too high

[-DIE Wolf-]

Hey guys, I have creat some map but cant host it! I'm start my server and get this:

[SELECT ALL] Code:

read 3 map rotation entries from 'config\maprot.cfg'
MAP CHECK FAIL: The overall ceil height is too high (0 cubes)
maprot error: map 'Stupid-City' does not satisfy some basic requirements
MAP CHECK FAIL: The overall ceil height is too high (0 cubes)
maprot error: map 'Stupid-City' does not satisfy some basic requirements
MAP CHECK FAIL: The overall ceil height is too high (0 cubes)
maprot error: map 'Stupid-City' does not satisfy some basic requirements
MAP CHECK FAIL: The overall ceil height is too high (0 cubes)
maprot error: map 'Stupid-City' does not satisfy some basic requirements
MAP CHECK FAIL: The overall ceil height is too high (0 cubes)
maprot error: map 'Stupid-City' does not satisfy some basic requirements
MAP CHECK FAIL: The overall ceil height is too high (0 cubes)
maprot error: map 'Stupid-City' does not satisfy some basic requirements
MAP CHECK FAIL: The overall ceil height is too high (0 cubes)
maprot error: map 'Stupid-City' does not satisfy some basic requirements
ERROR: AssaultCube fatal error: maprot unusable

Help me! I'm sure my map have verry low ceil, it's lower than TwinTower map!