I'm setting up spring security with ldap for the first time (for both). I seem to be having some trouble getting DelegatingFilterProxy to instantiate. I'm looking for any ideas on how to solve this. I've tried importing the spring-security settings from a separate context file, but gone to plugging it into my application-context file.

web.xml
Code:
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/spring/root-context.xml</param-value>
	</context-param>
	
	<!-- Creates the Spring Container shared by all Servlets and Filters -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	
	<!-- Spring Security -->
	<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>
	

	<!-- Processes application requests -->
	<servlet>
		<servlet-name>appServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>
				/WEB-INF/spring/appServlet/servlet-context.xml
			</param-value>
		</init-param>
		<!-- <load-on-startup>1</load-on-startup> -->
	</servlet>
	
	<servlet-mapping>
		<servlet-name>appServlet</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
servlet-context.xml
Code:
	<annotation-driven />


	<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
	<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
	<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<beans:property name="prefix" value="/WEB-INF/views/" />
		<beans:property name="suffix" value=".jsp" />
	</beans:bean>

	<context:component-scan base-package="com.americancentury.itsos" />

 	<beans:bean id="SurveyRep" class="com.americancentury.itsos.model.SurveyRep" autowire="constructor" />
	<beans:bean id="SurveyTeamService" class="com.americancentury.itsos.model.SurveyTeamService" />
 	<beans:bean id="TeamActivityService" class="com.americancentury.itsos.model.TeamActivityService" />
 	<beans:bean id="ActivityTypeService" class="com.americancentury.itsos.model.ActivityTypeService" />
 	<beans:bean id="SurveyRepService" class="com.americancentury.itsos.model.SurveyRepService" />
 

<!--   Spring Security Context -->
	<sec:http auto-config="true">
		<sec:intercept-url pattern="/**" access="IS_AUTHENTICATED_ANONYMOUSLY" />
	</sec:http>
 
	<sec:authentication-manager>
	  <sec:authentication-provider ref="defaultAuthenticationProvider" />
	  <!--  <sec:authentication-provider>
	    <sec:user-service>
			<sec:user name="admin" password="admin" authorities="ROLE_ADMIN" />
	    </sec:user-service>
	  </sec:authentication-provider> -->
	</sec:authentication-manager>
 
 	<beans:bean id="defaultAuthenticationProvider" class="org.springframework.security.ldap.authentication.LdapAuthenticationProvider">
        <beans:constructor-arg>  
  			<beans:bean class="org.springframework.security.ldap.authentication.BindAuthenticator">  
  				<beans:constructor-arg ref="ssContextSource"/>  
				<beans:property name="userSearch" ref="userSearch" />
            </beans:bean>
        </beans:constructor-arg>  
  
        <beans:constructor-arg ref="defaultLdapAuthoritiesPopulator" />
    </beans:bean>
    
	<!-- ******************************* -->
	<!-- ldap setup for active directory -->
	<!-- ******************************* -->
	
	<beans:bean id="ssContextSource" class="org.springframework.security.ldap.DefaultSpringSecurityContextSource">  
 		<beans:constructor-arg value="server/DC=acslan,DC=ac,DC=ac,DC=com?sAMAccountName?sub?(objectClass=*)" />  
  		<beans:property name="userDn" value="CN=LDAP,CN=Users,DC=ac,DC=ac,DC=ac,DC=com"/>  
 </beans:bean>  
  
    <beans:bean id="defaultLdapAuthoritiesPopulator" class="org.springframework.security.ldap.userdetails.DefaultLdapAuthoritiesPopulator">  
 		<beans:constructor-arg ref="ssContextSource" />
      	<beans:constructor-arg value="" />
      	<beans:property name="rolePrefix" value="ROLE_"/>
      	<beans:property name="searchSubtree" value="true"/>
      	<beans:property name="convertToUpperCase" value="false"/>
      	<beans:property name="ignorePartialResultException" value="true" />
   	</beans:bean>
    
    <beans:bean id="userSearch" class="org.springframework.security.ldap.search.FilterBasedLdapUserSearch">  
  		<beans:constructor-arg index="0" value=""/>  
  		<beans:constructor-arg index="1" value="(&(sAMAccountName={0})(objectclass=user))"/>  
  		<beans:constructor-arg index="2" ref="ssContextSource" /> 
   	</beans:bean>
   
<!--  End Spring Security -->
Stacktrace
INFO : org.springframework.beans.factory.xml.XmlBeanDefin itionReader - Loading XML bean definitions from ServletContext resource [/WEB-INF/spring/root-context.xml]
INFO : org.springframework.beans.factory.support.DefaultL istableBeanFactory - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultL istableBeanFactory@457d21: defining beans []; root of factory hierarchy
INFO : org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 625 ms
Dec 13, 2011 8:27:47 PM org.apache.catalina.core.StandardContext filterStart
SEVERE: Exception starting filter springSecurityFilterChain
org.springframework.beans.factory.NoSuchBeanDefini tionException: No bean named 'springSecurityFilterChain' is defined
at org.springframework.beans.factory.support.DefaultL istableBeanFactory.getBeanDefinition(DefaultListab leBeanFactory.java:527)
at org.springframework.beans.factory.support.Abstract BeanFactory.getMergedLocalBeanDefinition(AbstractB eanFactory.java:1083)
at org.springframework.beans.factory.support.Abstract BeanFactory.doGetBean(AbstractBeanFactory.java:274 )
at org.springframework.beans.factory.support.Abstract BeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.context.support.AbstractApplic ationContext.getBean(AbstractApplicationContext.ja va:1079)
at org.springframework.web.filter.DelegatingFilterPro xy.initDelegate(DelegatingFilterProxy.java:217)
at org.springframework.web.filter.DelegatingFilterPro xy.initFilterBean(DelegatingFilterProxy.java:145)
at org.springframework.web.filter.GenericFilterBean.i nit(GenericFilterBean.java:179)
at org.apache.catalina.core.ApplicationFilterConfig.i nitFilter(ApplicationFilterConfig.java:273)
at org.apache.catalina.core.ApplicationFilterConfig.g etFilter(ApplicationFilterConfig.java:254)
at org.apache.catalina.core.ApplicationFilterConfig.s etFilterDef(ApplicationFilterConfig.java:372)
at org.apache.catalina.core.ApplicationFilterConfig.< init>(ApplicationFilterConfig.java:98)
at org.apache.catalina.core.StandardContext.filterSta rt(StandardContext.java:4584)
at org.apache.catalina.core.StandardContext$2.call(St andardContext.java:5262)
at org.apache.catalina.core.StandardContext$2.call(St andardContext.java:5257)
at java.util.concurrent.FutureTask$Sync.innerRun(Futu reTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.jav a:138)
at java.util.concurrent.ThreadPoolExecutor$Worker.run Task(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run (ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
INFO : org.springframework.web.context.support.XmlWebAppl icationContext - Closing Root WebApplicationContext: startup date [Tue Dec 13 20:27:46 CST 2011]; root of context hierarchy
INFO : org.springframework.beans.factory.support.DefaultL istableBeanFactory - Destroying singletons in org.springframework.beans.factory.support.DefaultL istableBeanFactory@457d21: defining beans []; root of factory hierarchy
Dec 13, 2011 8:27:47 PM org.apache.catalina.core.StandardContext startInternal
SEVERE: Error filterStart