Lightmap error

Helo everyone!

I have a problem with lightmaps but only in 3 objects, bed sofa and carpet. I would like to know why i have this problem when i setted the light map res of the model up to 512, uvs are good, and the world settings high. I attached the images down.
Thanks beforehand!

An other example in the same scene. The part of the wall with bad lightmaps is the same mesh as the smooth shadow walls.