JBoss EAP6.1 + spring2.6 + DWR(Direct Web Remoting) occur "Class not found"

Issue

DWR3 is not working well with spring 2.6 on JBOSS but it is working well on weblogic/tomcat.

Error message is "Class not found"

09:31:38,139 ERROR [org.directwebremoting.impl.DefaultCreatorManager] (http-/127.0.0.1:8080-1) Class not found: 'adminService'
09:31:38,140 WARN  [org.directwebremoting.impl.DefaultCreatorManager] (http-/127.0.0.1:8080-1) Names of known classes are: __Data __System
09:31:38,142 WARN  [org.directwebremoting.servlet.ExceptionHandler] (http-/127.0.0.1:8080-1) Error: java.lang.SecurityException: Class not found