pam problem in openssh-3.7.1p2

[alex]

ok, here the log
+root at alex ~/ssh+ ls -al
total 1604
drwxr-xr-x   2 root  wheel     512 Oct  4 17:03 .
drwxr-xr-x  16 root  wheel    1024 Oct  4 17:02 ..
-rw-------   1 root  wheel  791161 Sep 22 15:06 openssh-3.7.1p1.tar.gz
-rw-------   1 root  wheel  792280 Sep 25 15:00 openssh-3.7.1p2.tar.gz
+root at alex ~/ssh+ tar xzf openssh-3.7.1p2.tar.gz
+root at alex ~/ssh+ cd openssh-3.7.1p2
+root at alex ~/ssh/openssh-3.7.1p2+ ./configure --prefix=/usr 
--sysconfdir=/etc/ssh --with-pam | grep PAM
configure: WARNING: Make sure the path to scp is in /etc/login.conf
                       PAM support: yes
PAM is enabled. You may need to install a PAM control file
Example PAM control files can be found in the contrib/
+root at alex ~/ssh/openssh-3.7.1p2+ make > /dev/null
uuencode.c: In function `uuencode':
uuencode.c:35: warning: implicit declaration of function `__b64_ntop'
uuencode.c: In function `uudecode':
uuencode.c:53: warning: implicit declaration of function `__b64_pton'
session.c: In function `do_setup_env':
session.c:975: warning: unused variable `path'
auth-pam.c:56:1: warning: "__unused" redefined
In file included from /usr/include/stdio.h:43,
                 from includes.h:24,
                 from auth-pam.c:33:
/usr/include/sys/cdefs.h:139:1: warning: this is the location of the previous 
definition
+root at alex ~/ssh/openssh-3.7.1p2+ killall sshd
+root at alex ~/ssh/openssh-3.7.1p2+ ./sshd -Ddddddddddddd
... bla bla bla ... in another terminal: ssh 127.0.0.1
debug1: auth2_challenge_start: trying authentication method 'pam'
debug3: mm_sshpam_init_ctx
debug3: mm_request_send entering: type 46
debug3: monitor_read: checking request 46
debug3: mm_answer_pam_init_ctx
debug3: mm_request_send entering: type 47
debug3: mm_request_receive entering
debug3: mm_sshpam_init_ctx: waiting for MONITOR_ANS_PAM_INIT_CTX
debug3: mm_request_receive_expect entering: type 47
debug3: mm_request_receive entering
debug3: mm_sshpam_init_ctx: pam_init_ctx failed
Failed keyboard-interactive for root from 127.0.0.1 port 50684 ssh2
...
so pam don't work
but !!!
do absolutily the same with openssh-3.7.1p1 and it work wonderfull, 
why ?
+root at alex ~+ uname -a
FreeBSD alex.3fn.net 5.1-RELEASE FreeBSD 5.1-RELEASE #0: Wed Sep 17 22:20:52 
EEST 2003     root at alex.ukr.net:/usr/src/sys/i386/compile/TEST  i386

use same config & pam.d/sshd with both test openssh-3.7.1p1 & openssh-3.7.1p2
+root at alex ~/ssh/openssh-3.7.1p2+ grep Chall /etc/ssh/sshd_config
ChallengeResponseAuthentication yes
+root at alex ~+ cat /etc/pam.d/sshd
...
# $FreeBSD: src/etc/pam.d/sshd,v 1.15 2003/04/30 21:57:54 markm Exp $
...

whe need pam, pls help
best regards
Alex