Help with password expire

I am trying to use freebsd's way of password expiration to make it so i need 
to change my password every 30 days ive got:
:warnpassword=4d:\
:passwordtime=30d:
in my /etc/login.conf did a cap_mkdb /etc/login.conf
i tryed to change the password of one of my users using passwd and it doesnt 
seem to add a change time to it according to chpass the:
Change [month day year]:
stays unchanged but if i manually add the change time using pw it adds the 
change time but if i change the password it doesnt add a new change time do 
i need to edit the /etc/pam.d/passwd and uncomment the top line thats 
commented out ? cause it seems to be broken atm as it doesnt do what i ask 
it to do.
if you need anythign else please let me know

-chris

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