[Paraview] problems with vtu format

[Giovanni Delibra]

Hello everybody
I've been trying to write down a routine to export the results from my cfd  
code in paraview format
I've been able to work with vtk format but wher I try to write in vtu  
(xml) format paraview 3.4.0 read the file without giving any errors, the  
log shows a correct number of cells and points and a listing of all the  
variables but simply NOTHING appear in the workspace
The same behaviour appears both on win and linux machines

Can anyone help me guess what's wrong with this file?
what should appear is a simple cube made of hexaedrals with different  
dimensions (as a matter of fact they are clustered near the "walls")

As it's quite long (almost 1000 points) I won't stick it in this message,  
I'm trying to zip and attach it; if attachments are not allowed (it's not  
clear from the ML web page) I've uploaded it on rapidshare (max 10  
downloads allowed)
http://rs367.rapidshare.com/files/163719862/chan1_180.vtu
If not let me just know how to show this file...
Thanks in advance,
-- 
Giovanni Delibra