If you're using jaxb from within the jwsdp-2.0 download, then I'm afraid you have to make an addition download of the newest jaxb ri. It is 2.2.1 the last time I looked at it. The jaxb-xjc.jar that came with the jwsdp-2.0 is wrongly bundled with a beta that's why. Use the latest download to replace the jaxb that came with it.
subject: JAXB2 and JDK 1.6.0 Compatibility Problem