multipart/form-data charset for xml

Hi,

How do I control the charset of the xml in my multipart request?

Currently it is sent using Cp1252.

But I want it to be sent as utf-8 so I tried adding it to the header of the request but that does not have the desired effect:

I also tried adding the encoding option to the soapui.bat file:

set JAVA_OPTS=%JAVA_OPTS% -Dfile.encoding="utf-8"

But none of it makes a difference, the xml is sent using charset Cp1252.

I'm using SoapUI 5.3.0.

Can anyone help me?

Cheers.