multipart/form-data w/ boundaries - request failing - same headers/body pass using fiddler

Hi,

I got the similiar problem when trying to set up the POST multipart/form-data in SoapUI.

I added the following to the Header:

'Contenty-Type' with  the value of 'multipart/form-data; boundary=----WebKitFormBoundaryA6X2XSe7EZhljISy'

Select the 'Media Type' as 'multipart/form-data', then put the following content to the request body:

------WebKitFormBoundaryA6X2XSe7EZhljISy
Content-Disposition: form-data; name="file"; filename="attachment.txt"
Content-Type: text/plain

------WebKitFormBoundaryA6X2XSe7EZhljISy
Content-Disposition: form-data; name="subject"

Version(master)_URL(https://mercury-qa.morningstar.com/#)
------WebKitFormBoundaryA6X2XSe7EZhljISy
Content-Disposition: form-data; name="topic"

Asset Allocation
------WebKitFormBoundaryA6X2XSe7EZhljISy
Content-Disposition: form-data; name="country"

CU$$$$$USA
------WebKitFormBoundaryA6X2XSe7EZhljISy
Content-Disposition: form-data; name="recipients"

------WebKitFormBoundaryA6X2XSe7EZhljISy
Content-Disposition: form-data; name="feedback"

test
------WebKitFormBoundaryA6X2XSe7EZhljISy--

Then attached the file 'attachment.txt', run it, I got the following error:

HTTP/1.1 500 Internal Server Error

Did I miss anything? Anyone is able to help?

Thanks!