Auth Problems Sasl + Courier IMAP/POP

[starfoxx]

Hi,

in /etc/postfix/sasl/smtpd.conf it writes:

pwcheck_method: saslauthd auxprop
auxprop_plugin: sql
mech_list: PLAIN LOGIN cram-md5 digest-md5
allow_plaintext: true
sql_engine: mysql
sql_hostnames: localhost
sql_user: xxxxx
sql_passwd: xxxxx
sql_database: ispcp
sql_select: select mail_pass from mail_users where mail_addr=.%r. and mail_acc='%u'
sql_verbose: yes
log_level: 7

Is this right?

and where must the sasldb2 file save. down the postfix chroot?

Greetz
starfoxx