Hi Andre!
I've done test as described in that link and everything was fine. It's strange - from WebServiceNavigator (from Java instance) web-service called without any problems but call from WDJ application led to the error mentioned in my start message.
This error had gone after I recreated web-service configurations in SOAMANAGER and it seems that everything working fine now. But I'm going to perform more tests for our WDJ applications and after that I'll close his thread with points if everyting will be fine.
Regards,
Lev