CAS server authentication using LDAP

I have 2 web application and I want to use CAS server connecting to LDAP for authentication. I have installed apache DS and configured CAS server like this:
https://wiki.jasig.org/display/CASUM/CAS+on+Windows+Quick+Setup+Guide
first I added this to pom.xml in cas server :

${project.groupId}
cas-server-support-ldap
${project.version}

then in deployerConfigContext.xml added this lines:

    
ldap://localhost:10389
    

  
    
      
    
  

removed the demo authentication handler
added this:

for the last steps I have added these 2 steps to libs:
spring-ldap-X.Y.Z.RELEASE-all.jar
cas-server-support-ldap-$VERSION.jar
as soon as I deployed cas server in tomcat, I tried to login using admin/secret credentials but this message appears:
The credentials you provided cannot be determined to be authentic.

please help.