[wikka-community] FreeMind "Cannot load map" Question

[info]

Hello

I have tried to load, either by pasting a link (url) to an mm file or 
pasting the contents of an mm file into an edited page on our Wikkawiki 
version 1.3.1 and get the error: "Cannot load map".  However, if I go to:

WikkaWiki 1.3.1 Demo Site : SandBox
http://demo.wikkawiki.org/SandBox

I can paste the contents of the mm file and it works fine !

Ergo, I must conclude our server has a configuration problem.

Any suggestions for what to consider?

Thank you kindly.