Content type not saved properly

At admin/user/realname/module page ("Modules" tab), after choosing "Content profile" module, a page with "Content types available to content_profile" appear. There a list with all my profiles with inactivated radio buttons is shown.
1.-I chose one profile for the list. Radio button turns active.
2.-I click on "Use this module" button.
3.-I get the same page, without any message, with all radio buttons inactivated.
4.-At admin/user/realname page ("Fields" tab) I get the fields of all my profiles.

It is the correct behaviour? It is a bug?

Thanks