[jopendocument] OOUtils

[emy]

I've tried the demo sample (Getting started - Create a spreadsheet)
and all work fine. The ods file is created, but when I call
OOUtils.open(file) OpenOffice Calc don't start (and there is no
exception throws). I've OO 3.1.1 installed on Ubuntu 8.04. If i try
from a terminal "openoffice.org3 -calc", OO Calc starts.
Where is my mistake?
thanks emy