Hi Alan! I'm totally sorry. IT WORKED!!!! :o) Hacking an USB driver made me so confuse that I forgot to attach the clock to the cable. So the clock obviously couldn't answer my request (and unfortunately it has no kind of telepathic or wireless serial connection ^^). So thanks for standing by my side. I am proud having my first own Linux driver now and am indebted to you and Greg. Marian -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html