When booting into Linux OS via Plop, virtual machine turns black

[JoshIsci]

I created a virtual machine in VirtualBox, and attached the plop .iso image under the storage section, and I attached my USB in the USB section, and clicked the 1.0, which is the one that works for my version of VirtualBox i've read. On my USB I have mounted it with Sana / Kali 2.0, w/ persistence

But when I boot it up, and choose 'Plop Boot Manager' and choose 'USB' it connects successfully, but it the virtual machine screen goes black, and I dont know why.

any help is appreciated