I read previous topic and
I wrote:

############################
database.sql
############################
...
create table jboss_users(
code integer not null primary key,
name varchar( 20),
passwd varchar( 20),
therole varchar( 20)
);

insert into jboss_users values ( 1, 'dm', 'dm', 'admin');
insert into jboss_users values ( 2, 'qwerty', 'qwerty', 'user');
...
############################
server/default/conf/login-config.xml
############################
...
<application-policy name = "mozheyko">

<login-module code = "org.jboss.security.auth.spi.DatabaseServerLoginModule" flag = "required">
<module-option name="dsJndiName">java:/FirebirdDS</module-option>
<module-option name="pricipalsQuery">select passwd from jboss_users where name=?</module-option>
<module-option name="rolesQuery">select therole, 'Roles' from jboss_users where name=?</module-option>
</login-module>

</application-policy>
...
############################
jboss-web.xml
############################
...
<security-domain>java:/jaas/mozheyko</security-domain>
...

############################

and turn DEBUG level in log4j.xml

I RECEIVE:
...
2003-06-17 16:16:53,278 DEBUG [org.jboss.jetty.security.JBossUserRealm#Main servlet] JBossUserPrincipal: dm
2003-06-17 16:16:53,283 DEBUG [org.jboss.jetty.security.JBossUserRealm#Main servlet] created JBossUserRealm::JBossUserPrincipal: admin
2003-06-17 16:16:53,284 DEBUG [org.jboss.jetty.security.JBossUserRealm#Main servlet] authenticating: Name:admin Password:****2003-06-17
...
16:16:53,316 DEBUG [org.firebirdsql.jca.FBManagedConnection] preparing sql: select Password from Principals where
PrincipalID=?
...
What i forget and whence this quiry has undertaken ?