Thank's a lot Mark. Effectivly, I thought i had already upadted my NGX but in fact, I'd not removed the previous version and i'd chosen the "repair" option of the installer (instead of a full instllation), that's not the good method. This time i did good and the remote CDU works perfectly. I've purchased the full version this day. It's a dream !!!! Thank you very much for this app so simple and low cost. No expensive device complicated to program with SIOC or other, just a tablet and a wifi connection ! Saving space on home, saving money and saving my gaming time (no breakdown to configurate, i can play immediatly !), Thank you !