I'm trying to implement Spring security for my GAE application however I'm getting this error:

No bean named 'springSecurityFilterChain' is defined

I added this configuration on my application web.xml:

<filter>
    <filter-name>springSecurityFilterChain</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>

<filter-mapping>
  <filter-name>springSecurityFilterChain</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>  

And in the servlet-context:

<!-- Configure security -->
<security:http auto-config="true">
    <security:intercept-url pattern="/**" access="ROLE_USER" />
</security:http>

<security:authentication-manager alias="authenticationManager">
    <security:authentication-provider>
        <security:user-service>
            <security:user name="jimi" password="jimi" authorities="ROLE_USER, ROLE_ADMIN" />
            <security:user name="bob" password="bob" authorities="ROLE_USER" />
        </security:user-service>
    </security:authentication-provider>  
</security:authentication-manager>

What could be causing the error?