this is my login-config.xml file:

*** begin file ***

<?xml version='1.0'?>

<!DOCTYPE policy PUBLIC "-//JBoss//DTD JBOSS Security Config 3.0//EN" "http://www.jboss.org/j2ee/dtd/security_config.dtd">

<policy>

<!-- Used by clients within the application server VM such as

mbeans and servlets that access EJBs.

-->

<application-policy name = "client-login">

<authentication>

<login-module code = "org.jboss.security.ClientLoginModule"

flag = "required">

</login-module>

</authentication>

</application-policy>

<!-- Security domain for JBossMQ -->

<application-policy name = "jbossmq">

<authentication>

<login-module code = "org.jboss.security.auth.spi.DatabaseServerLoginModule"

flag = "required">

<module-option name = "unauthenticatedIdentity">guest</module-option>

<module-option name = "dsJndiName">java:/DefaultDS</module-option>

<module-option name = "principalsQuery">SELECT PASSWD FROM JMS_USERS WHERE USERID=?</module-option>

<module-option name = "rolesQuery">SELECT ROLEID, 'Roles' FROM JMS_ROLES WHERE USERID=?</module-option>

</login-module>

</authentication>

</application-policy>

<!-- Security domain for JBossMQ when using file-state-service.xml

<application-policy name = "jbossmq">

<authentication>

<login-module code = "org.jboss.mq.sm.file.DynamicLoginModule"

flag = "required">

<module-option name = "unauthenticatedIdentity">guest</module-option>

<module-option name = "sm.objectname">jboss.mq:service=StateManager</module-option>

</login-module>

</authentication>

</application-policy>

-->

<!-- Security domains for testing new jca framework -->

<application-policy name = "HsqlDbRealm">

<authentication>

<login-module code = "org.jboss.resource.security.ConfiguredIdentityLoginModule"

flag = "required">

<module-option name = "principal">sa</module-option>

<module-option name = "userName">sa</module-option>

<module-option name = "password"></module-option>

<module-option name = "managedConnectionFactoryName">jboss.jca:service=LocalTxCM,name=DefaultDS</module-option>

</login-module>

</authentication>

</application-policy>

<application-policy name = "JmsXARealm">

<authentication>

<login-module code = "org.jboss.resource.security.ConfiguredIdentityLoginModule"

flag = "required">

<module-option name = "principal">guest</module-option>

<module-option name = "userName">guest</module-option>

<module-option name = "password">guest</module-option>

<module-option name = "managedConnectionFactoryName">jboss.jca:service=TxCM,name=JmsXA</module-option>

</login-module>

</authentication>

</application-policy>

<!-- A template configuration for the jmx-console web application. This

defaults to the UsersRolesLoginModule the same as other and should be

changed to a stronger authentication mechanism as required.

-->

<application-policy name = "jmx-console">

<authentication>

<login-module code="org.jboss.security.auth.spi.UsersRolesLoginModule"

flag = "required">

<module-option name="usersProperties">props/jmx-console-users.properties</module-option>

<module-option name="rolesProperties">props/jmx-console-roles.properties</module-option>

</login-module>

</authentication>

</application-policy>

<!-- A template configuration for the web-console web application. This

defaults to the UsersRolesLoginModule the same as other and should be

changed to a stronger authentication mechanism as required.

-->

<application-policy name = "web-console">

<authentication>

<login-module code="org.jboss.security.auth.spi.UsersRolesLoginModule"

flag = "required">

<module-option name="usersProperties">web-console-users.properties</module-option>

<module-option name="rolesProperties">web-console-roles.properties</module-option>

</login-module>

</authentication>

</application-policy>

<!-- A template configuration for the JBossWS web application (and transport layer!).

This defaults to the UsersRolesLoginModule the same as other and should be

changed to a stronger authentication mechanism as required.

-->

<application-policy name="JBossWS">

<authentication>

<login-module code="org.jboss.security.auth.spi.UsersRolesLoginModule"

flag="required">

<module-option name="unauthenticatedIdentity">anonymous</module-option>

</login-module>

</authentication>

</application-policy>

<!-- The default login configuration used by any security domain that

does not have a application-policy entry with a matching name

-->

<application-policy name = "other">

<!-- A simple server login module, which can be used when the number

of users is relatively small. It uses two properties files:

users.properties, which holds users (key) and their password (value).

roles.properties, which holds users (key) and a comma-separated list of

their roles (value).

The unauthenticatedIdentity property defines the name of the principal

that will be used when a null username and password are presented as is

the case for an unuathenticated web client or MDB. If you want to

allow such users to be authenticated add the property, e.g.,

unauthenticatedIdentity="nobody"

-->

<authentication>

<login-module code = "org.jboss.security.auth.spi.UsersRolesLoginModule"

flag = "required" />

</authentication>

</application-policy>

</policy>

*** end file ***

 Looks like an XML format error....copy your login-config.xml here