Can you create a Project Template in one instance of Agile, say a development instance, test it and

We have tried to export to xml and then use the actions Publish from Microsoft Project, but keep getting the following error:

The XML file does not correspond to the activity "X"

X = the Name of the Project

What is the difference of building a Microsoft Project and importing it via the Publish, versus exporting the xml from Agile, editing and publishing to a new project?