Helo I m using PAM module on linux system

I have one strange problem.
I have create user and assigned group using my own function.

I m giving more than 8 character password.
Now when I enter upto 8 character then also it will accept.
In short It validate only first 8 character. can U tell me how do I change this setting.

My /etc/pam.d/passwd entry are given bewlo:

#%PAM-1.0
auth required pam_stack.so service=system-auth
account required pam_stack.so service=system-auth
password required pam_stack.so service=system-auth

/etc/pam.d/system-auth file contains following:


#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
auth required /lib/security/$ISA/pam_env.so
auth sufficient /lib/security/$ISA/pam_unix.so likeauth nullok
auth required /lib/security/$ISA/pam_deny.so

account required /lib/security/$ISA/pam_unix.so
account sufficient /lib/security/$ISA/pam_succeed_if.so uid < 100 quiet
account required /lib/security/$ISA/pam_permit.so

password requisite /lib/security/$ISA/pam_cracklib.so retry=3
password sufficient /lib/security/$ISA/pam_unix.so nullok use_authtok md5 shadow
password required /lib/security/$ISA/pam_deny.so

session required /lib/security/$ISA/pam_limits.so
session required /lib/security/$ISA/pam_unix.so


what to to

Amit