I am using the HTTP File Upload Smart Service. The file is uploaded fine but it

I am using the HTTP File Upload Smart Service. The file is uploaded fine but it includes the HTTP request headers before the file contents. For example, the following lines are included at the start of the file and thus corrupt it:
--QSwL4z2sIwuo_6rxYP9gnwQff72InEGdLF49X
Content-Disposition: form-data; name="file"; filename="Bug10204.doc"
Content-Type: application/msword
Content-Transfer-Encoding: binary

Am I missing a parameter somewhere?

OriginalPostID-150638

OriginalPostID-150638