problem biztalk wss adapter

hello,

 I'm using my biztalk application to modify a infopath form.  I send my form to the documentlibary en biztalk ik getting the form. In my solution biztalk made changes in the form, en send in by e-mail. Now i want the same (modified) form save in sharepoint. With the biztalk adapter is it possible. But i've turn on version history in the library, and i've set overwrite to Yes in the sharepoint adapter. But when biztalk is saving the form, i've lost my document history. It's seems that biztalk create a new file, instead update a file. How can i save a updated form en leaves the version history.

 please help