[Solved] I'm doing wrong in changing courier for dovecot?

[kurgans]

Good afternoon everyone:

I changed local server to dovecot, mail server works perfectly

Code:

Mar 15 20:48:47 bst1 postfix/qmgr[5213]: E7BDE8BD90: from=<antonio.azaustre@bst1.com>, size=738, nrcpt=1 (queue active)
Mar 15 20:48:47 bst1 postfix/smtpd[5234]: disconnect from bst1.local.local[127.0.0.1]
Mar 15 20:48:48 bst1 postfix/smtp[5237]: E7BDE8BD90: to=<bongostudio@gmail.com>, relay=gmail-smtp-in.l.google.com[209.85.219.44]:25, delay=3.3, delays=1.5/0.04/0.71/0.98, dsn=2.0.0, status=sent (250 2.0.0 OK 1237140268 24si4907758ewy.1)
Mar 15 20:48:48 bst1 postfix/qmgr[5213]: E7BDE8BD90: removed

But in my logs it appears this record, creating a line for each email account

Code:

Mar 15 20:51:09 bst1 dovecot: auth(default): PAM: kill(5246) failed: No such process
Mar 15 20:51:09 bst1 dovecot: auth(default): pam(antonio.azaustre@bst1.com,127.0.0.1): PAM child process 5219 timed out, killing it
Mar 15 20:51:09 bst1 dovecot: auth(default): PAM: kill(5219) failed: No such process
Mar 15 20:51:09 bst1 dovecot: auth(default): pam(antonio.azaustre@bst1.com,127.0.0.1): PAM child process 5222 timed out, killing it
Mar 15 20:51:09 bst1 dovecot: auth(default): PAM: kill(5222) failed: No such process
Mar 15 20:51:09 bst1 dovecot: auth(default): pam(antonio.azaustre@bst1.com,127.0.0.1): PAM child process 5230 timed out, killing it
Mar 15 20:51:09 bst1 dovecot: auth(default): PAM: kill(5230) failed: No such process

Someone knows that I receive these messages?
I mounted the server operating system with new Debian etch 5, RC-1

Thanks