I am developing a web application using Oracle\'s OEPE distribution, including Weblogic server 10.3.5. WLS includes its own version of Spring, which appears to be 2.5.6.SEC0
I had the same problem. The solution was to create weblogic-application.xml into the META-INF folder of EAR project. Here is the code.
org.apache.*
org.springframework.*
Maybe your problem is that you're using weblogic.xml into WAR project instead of weblogic-application.xml into EAR project.
Hope it helps.