setProperty must be overridden by all subclasses of SOAPMessage
There are a few thing that might go wrong, so I will tell you what helped in my case (analogous to yours, I was using JDK 1.6.0_13). The problem lies in JARs mismatch. First of all make sure JBoss is using JDK 1.6 check your JAVA_HOME env. variable. Secondly make sure your classes are compiled … Read more