XForms+WS problem

Hi, all...

I've found some problem from interaction XForms with WebServices:
Almost everything works fine, but if SoapFault occurs - FormsPlayer 
displays FatalError (because of HTTP 500 code, i think). And i can't 
catch&show faultstring etc..
Q: How to handle this in case that the WebService *must* sent 500 http 
error code (from SOAP 1.1 Spec)?

-- 
Alexander Anokhin
AVTOVAZ JSC
email:ava@vaz.ru
icq:123275798