parsing of soap body with xml content

[jonnytest1]

when sending a soap request with xml content (html page) as parameter soap creates a request with "content-type" "multipart/related" this library cannot parse requests like that though and fails with

"{ Fault:
{ faultcode: 500,
faultstring: 'Invalid XML',
detail:
'Error: Non-whitespace before first tag.\nLine: 0\nColumn: 1\nChar: -',
statusCode: 500 } }
"