procmail home mail directory problem

Hi,

I have a procmail question, I is using the latest verison of Procmail and 
Qpopper 4.0.3,
I want to procmal to deliver my email to /usr/mail/j/w/jwu , but procmail 
always send my email to 
/var/spool/mail/jwu though I have setup my home directory to /usr/mail/j/w in 
/etc/passwd, how to setup it ? BTW, I am using Redhat 6.2


thanks
Jephe