problem with pam authentication via radius

[Vladimir Voronin]

I try to make PAM authentication on FreeBSD-server (FreeBSD 5.3-BETA1) 
using RADIUS (freeradius-0.9.3_1) and RADIUS using LDAP  
(openldap-server-2.2.14).

/etc/pam.d/sshd :
auth           sufficient      pam_radius.so
auth           required       pam_nologin.so          no_warn
auth           sufficient      pam_opie.so             no_warn 
no_fake_prompts
auth           requisite       pam_opieaccess.so       no_warn allow_local
auth           required       pam_unix.so             no_warn try_first_pass
account      sufficient      pam_radius.so
account       required       pam_login_access.so
account       required       pam_unix.so
session       required       pam_permit.so
password    required       pam_unix.so             no_warn try_first_pass

There are not any problem when I try authenticate user, who exists in 
/etc/passwd. PAM asks RADIUS and RADIUS compares data with data in 
LDAP-database. But when authenticate user who exists only in 
LDAP-database (and there isn't in /etc/passwd on FreeBSD-server)
PAM isn't ask RADIUS (nothing in logs of RADIUS). Why this situation 
take place?
How to fix this problem?