XML payload from a file

I have hosted a web service inside Mule with CXF. I had the WSDL, so I generated the data holders etc using WSDL2Java. Then I updated the single operation service is supposed to have. I tested the web service with SOAPUI, it worked.

Now I am trying to read a plain XML payload message from a file using file connector. But Mule is encoding the XML message. How can I just use that plain XML message from the file directly (no encoding required) and make a request to the service? Service is SOAP based. Right now I am using file-to-string-transformer and object-to-xml-transformer