Can't get XML output from concurrent process - need to define XML Schema

Hello there,

I am very new with XML stuff.  However, we are on a project which need to generate XML output file.  I thought I need to follow those steps:

-  Set the concurrent process output as XML

-  Set the data definition for the concurrent process and add XML schema

-  Set template with the data definition for the concurrent process

Right now, I have a hard time to add XML schema.  Every time when I try to add a .xsd file, I got message: The uploaded file xxxx.xsd is invalid. The file should be in XSD format.

Here is what I have for the file: