[Koha] restriction with a member

hi i need your help, how can add a limit of books for the diferents users, i go to a the option in system parameters and add a new category for the diferents users for example Doctor with limit of issues 7, Student with limit of issues 3, and Teacher with limit of issues 5, then it is that at the time of lending books to the users it does not put any restriction to me and I can request the books that are does, not establish any limits in nobody category that it has chosen, please I need as I can do correct that problem, I hope can solve my doubt thanks _________________________________________________________________ Únete al mayor servicio mundial de correo electrónico: http://www.hotmail.com