i am running my spring web application in jboss server, while starting the server i am getting the error as

14:36:35,072 ERROR [DispatcherServlet] Context initialization failed
org.springframework.beans.factory.BeanDefinitionSt oreException: Error registering bean with name 'exporter' defined in S
ervletContext resource [/WEB-INF/timex-servlet.xml]: Class that bean class [org.springframework.jmx.export.MBeanExporter
] depends on not found; nested exception is java.lang.NoClassDefFoundError: org/springframework/beans/factory/BeanClassL
oaderAware
java.lang.NoClassDefFoundError: org/springframework/beans/factory/BeanClassLoaderAware
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass
.................etc

like this, please any one suggest me what i need to do to rectify that error.