Hi chowyunli,
see this link you may get some help
http://groups.google.co.in/group/microsoft.public.infopath/browse_thread/thread/9696fe5705ebead6/5fdec983d74a85f9?lnk=st&q=the+soap+message+cannot+be+parsed&rnum=1&hl=en#5fdec983d74a85f9
Hope this will help you.
B.Shiva Prasad
InfoPath Dev,
http://www.ggktech.com
India