PostFix Error

core:/etc# postfix start
postfix/postfix-script: warning: /usr/lib/sendmail and /usr/sbin/sendmail differ
postfix/postfix-script: warning: Replace one by a symbolic link to the other
postfix/postfix-script: starting the Postfix mail system
core:/etc#

I got PostFix install and whenever I try to start it I am receiving the above error. Which location of sendmail should I replace w/ a symlink?

EDIT: Working. Thx