I found the problem : the drivers. As usual the drivers out of the box didn't work.
It took me a while to identify the USB infrared device, but once I did I downloaded the lastest drivers from the site. There was a special fix in the drivers for Nokia phones. After having installed those drives the thing worked instantaneously.
_________________________
Riocar 80gig S/N : 010101580 red
Riocar 80gig (010102106) - backup