Hello,
I am not sure how u are testing, but when i am sending XML delcartion inside body with do not use soap envelope checkbox ticked in soap sender (along with with nosoap= true in end of the URL), i am getting SOAP message in PI, so it's passing through adapter and failing at mapping level.
BTW, did u tried accessing message from SOAP envelope inside AXIS adapter?
Thanks
Amit Srivastava