Promiscious Mode on Wireless

Hello guys, I have a problem, i'm trying to sniff my wireless network with the promiscious mod, but i can only see packets that comes and goes of my computer, i can't see packets of other devices, but with monitor mod i can see everything but encrypted.

i tried wifisky 6000mw 18dpi model : usb-6000mw that have chepset RLT 8187L

and gap link model IDU 2850UG. with kali linux1 && 2 and ubuntu 15

software : wireshark and tcpdump

ps: if i spoof a device, i can see his packets.