Well, as you can read in the title, that is my problem. I've created a flexinode content type called "guestbook", and I've added 4 fields for it. In "access control", I've given create content permissions to everyone, including anonymous users, and I've given edit content permissions to authenticated users and to admins, so only excluding anonymous users.
When posting as admin, I haven't got any problem at all. Everything goes perfect. But when trying to post as any other role, I can click under the "create content" menu on the "guestbook" link. This points to node/add/flexinode-2. When it gets there, it only shows what corresponds to node/add, excluding the new content type "guestbook".
The only way that I've found, that authenticated and anonymous users can post, is giving them "node administration" permissions. But as you may guess, it's not precisely what I want.
Any ideas of how to post not being administrator?