help please, tp-ling wifi adapter not dected in virtualbox :(

ok, so i have ubuntu 14.04 LTS installed on my labtop(which i love)

i downloaded kali linux and installed in a virtualbox, when i plug in my tp-link usb wifi adapter but when i try to add a usb filter in settings
it says "no device availble" it works grand with ubuntu, but i want it to work in virtualbox and kali linux

can anyone help??? :(


ps the driver for the tp-link usb wifi adapter is ; rtl8192cu