Virtual users with VSFTPD

[Omar Chacon]

   Please forgive my ignorance.  I am very new at this.
   Following the instructions to create a virtual user for vsftpd
   service, I read that I must have the Berkeley DB program installed in
   order to run "db_load -T -t hash -f  file.nam /etc/vsftpd_login.db"
   but when I tried to run the string, I get "db_load: command not
   found"  if I try to run "db3_load.........." I get a message that
   reads "usage:  db_load........"
   pkg_info shows that I have db3-3.3.11,1 installed along with
   vsftpd-1.1.3.  I reinstalled both ports just to verify that they were
   indeed installed.  What am I doing wrong?   Many thanks.