Hi!
Thank you for the compliment.

I have found the problem, like told already before, in my level also have houses like map entity,
and the other houses are MDL format, when a house or any other object (MDL format) locates in the near of a map entity object, then happens this, I have eliminated all the map entity from my level and now is all ok, but I want to know because this happens, and besides because the objects type map entity doesn't do shadows on the terrain!

greet
salva