Module not being called?

["Boris Brelsav" <boris bsafesolutions com>]

Hi
I'm on RedHat 9. I've put my module at the top of the /etc/pam.d/passwd:
auth       required     pam_testmodule.so
auth       required     pam_stack.so service=system-auth
account    required     pam_stack.so service=system-auth
password   required     pam_stack.so service=system-auth

It's seems that the module is not being called. Could that be possible?

Thanks
Boris