Albert,
Does the weblogic-webservices.jar file contain the javax.jws package *and* the javax.jws.WebMethod class? If so, when you browse to your deployed folder location does your project correclty contain that JAR file under the WEB-INF/lib directory?
Also are you sure that weblogic doesn’t already have this JAR under it’s own server /lib directory? The reason I ask is because some app servers, when they detect a conflict like this (same JAR in two places) they will actually error out and *not* load the JAR at all, which could be causing the problem.