Caused by: java.lang.ClassNotFoundException: org.springframework.beans.BeansException from BaseClassLoader@1069693{vfs:///C:/Desarrollo/jboss-6.0.0.201 00721-M4/server/default/conf/jboss-service.xml}
This is the classloader that gets used, and it obviously cannot find the Spring class.
Where do you have your spring.jar placed?
Inside app won't do, or you need to use different classloader --> app's CL.
Placing it into server/<config>/lib or common/lib would work as well, but then it's shared with all apps.