Mokuuz

So I just got my duck, and I'm all new to this. Whenever I put a payload on my duck it won't excecute it, but instead it accesses the menu that I get when I press CTRL+ALT+DEL. I've tried flashing firmware, and I've sent a few mails to the hakshop mail, but I haven't gotten any response. Also I've tried a few different SD cards and computers. Help please?