Spring Security + Active Directory

Question

I'm a noob in spring world and trying to get spring/AD combo to work. My config is spring 3.0.3 + spring security 3.0.3 + spring ldap 1.3+ tomcat 6.0

I get the following when i try to access my secure page:

Reason: [LDAP: error code 49 - 80090308: LdapErr: DSID-0C0903A9, comment: AcceptSecurityContext error, data 52e, v1db0]; nested exception is javax.naming.AuthenticationException: [LDAP: error code 49 - 80090308: LdapErr: DSID-0C0903A9, comment: AcceptSecurityContext error, data 52e, v1db0]

Here's is my application-context:

     <http use-expressions="true">
        <intercept-url pattern="/secure/extreme/**" access="hasRole('ROLE_SUPERVISOR')"/>
        <intercept-url pattern="/secure/**" access="isAuthenticated()" />
        <intercept-url pattern="/**" access="permitAll" />
        <form-login />
        <logout />

          <!-- Uncomment to limit the number of sessions a user can have -->
        <session-management invalid-session-url="/timeout.jsp">
            <concurrency-control max-sessions="1" error-if-maximum-exceeded="true" />
        </session-management>
 <ldap-server
        url="ldap://xyz:389"
        manager-dn="CN=xyzuer, OU=xyzAccounts, DC=xyzcom, DC=com"
        manager-password="xxxxx"
    />
<authentication-manager alias="authenticationManager">
    <ldap-authentication-provider
        user-search-base="OU=CorpUsers, DC=xyzcom, DC=com"
        user-search-filter="sAMAccountName={0}"
        group-search-filter="member={0}"
        group-role-attribute="cn"
        group-search-base="OU=Groups, DC=xyzcom, DC=com"
    />
</authentication-manager>

I just have web.xml, application-context.xml, index.jsp and log4j.properties and nothing else.

Have any ideas as to where am wrong and why i get that error?

TIA