[Cumulus] Nokia N810 and IGC file ?

[Coyote]

Hello,
I'd like to use Cumulus on my N810 and I tested it in my car.
It's ok for GPS position and running, igc-logging is enabled (L in aStatus 
bar) but I didn't find an IGC file after testing.

My Data Directory is /media/mmc2/cumulus, waypoints and task are ok in this 
folder but I didn't find IGC file. Maps directory are /media/mmc2/cumulus/maps

I've been testing during 15 minutes. Can you help me to find those IGC files 
or to configure correctly Cumulus, please ? Thank you in advance, see you 
soon.

PS : Sorry for my english.