You can find detailed literature regarding this issue, such as
The main problem is that Weblogic 9 and 10 include SAAJ 1.2 interface but SAAJ 1.1 implementation. So, the use of SAAJ 1.2 and SAAJ 1.3 on Weblogic must be set externally.
I decided to include these lines on Spring context in order to get web services working on our system.
Updated! Spring Web Services JIRA