symfony/propel: starting with propel schemas

Question

Hi,

i have this propel schema:

comentario:
  id:
  author:      varchar(255)
  content:     longvarchar
  created_at:

when i do "build-all-load" the classes (model, form, filter) are not created.

But if i change add the _attributes key like this:

comentario:
   _attributes: { phpName: Comment }
  id:
  author:      varchar(255)
  content:     longvarchar
  created_at:

and then "build-all-reload" again the classes are created.

Why?

Javier

sf 1.4/propel