[Dovecot] dovecot and vpopmail

[Kris Northern]

Hello
Im using dovecot .99.14 with vpopmail 5.4.2 on debian sarge

I changed the settings in dovecot.conf

default_mail_env = maildir:/home/vpopmail/domains/%d/%u/Maildir
(my mail is in /home/vpopmail/domains/phidelity.com/kris/Maildir)
auth = vpopmail
auth_mechanisms = plain
auth_userdb = vpopmail
auth_passdb = vpopmail
auth_executable = /home/vpopmail/bin/vchkpw
auth_user = vpopmail

and when I start up dovecot I get these errors
Apr  4 22:43:01 mail dovecot: Dovecot starting up
Apr  4 22:43:02 mail dovecot: Auth process died too early - shutting down
Apr  4 22:43:02 mail dovecot: child 25759 (auth) returned error 11

can someone help me make sense of this? I couldnt find anything useful 
on google.
-kris