[Dovecot] dovecot_auth / pam_mysql login errors

[Roi Efrati]

I am getting this errors at the maillog file :
Dec 29 12:22:10 websrv dovecot-auth: pam_sm_authenticate called.
Dec 29 12:22:10 websrv dovecot-auth: host changed.
Dec 29 12:22:10 websrv dovecot-auth: database changed.
Dec 29 12:22:10 websrv dovecot-auth: dbuser changed.
Dec 29 12:22:10 websrv dovecot-auth: dbpasswd changed.
Dec 29 12:22:10 websrv dovecot-auth: table changed.
Dec 29 12:22:10 websrv dovecot-auth: usercolumn changed.
Dec 29 12:22:10 websrv dovecot-auth: passwdcolumn changed.
Dec 29 12:22:10 websrv dovecot-auth: crypt changed.
Dec 29 12:22:10 websrv dovecot-auth: sqllog changed.
Dec 29 12:22:10 websrv dovecot-auth: db_connect  called.
Dec 29 12:22:10 websrv dovecot-auth: returning 0 .           
Dec 29 12:22:10 websrv dovecot-auth: db_checkpasswd called.  
Dec 29 12:22:10 websrv dovecot-auth: pam_mysql: where clause = 
Dec 29 12:22:10 websrv dovecot-auth: SELECT password FROM email_users
WHERE log in='myname'
Dec 29 12:22:10 websrv dovecot-auth: sqlLog called.          
Dec 29 12:22:10 websrv dovecot-auth: returning 0 .           
Dec 29 12:22:10 websrv dovecot-auth: returning 0.

## And then:

Dec 29 12:22:10 websrv dovecot-auth: pam_mysql: setcred called but not implemen
ted.                                                         
Dec 29 12:22:10 websrv dovecot-auth: pam_mysql: acct_mgmt called but not implem
ented. Dont panic though :)                                  
Dec 29 12:22:10 websrv pop3-login: Internal login failure: myname
[xxx.xxx.xxx.xxx]

As much as I was trying to find reading material on them I have not
maneged to find something that will help me.
If anybody can shed some light on how to fix my server...