It found those errors:
can't load skybox file skybox/sky_goldrush_01 to build the default cubemap!
(i don't use a HDR skybox so is ok)
error loading studio model "models/ambulance.mdl"!
(i used prop_static, now changed to dynamic)
nodraw on terrain surface!
(fixed)
error loading studio model ""!
(i'm not finding the entity)
and
make_triangles:calc_triangle_representation: cannot convert
(i think i found the model, it was a displacement)
i will check now if the light is fixed...
EDIT: YEAH IT'S FIXED! Thanks guys, but is still a bit dark...