I can\'t boot my asus x401a from usb windows 8

[volks1989]

I have an ASUS x401-a and I'm trying to boot backtrack 5 via usb which I've done previously with windows 7 and my acer aspire , when i reboot it i hit escape and it brings me into bios settings i put my usb chipset as the 1st in boot priority order and try to boot backtrack and it boots straight into windows 8 everytime.... Some one please help me with this I miss security testing on my network. Thank you in advance. Volk.

 

[dusdat]

When I hit the esc button when I restart I can select frrom which boot device I want to boot, when I select the removable disk the screen just turns black, and the usb device isn't doing anything (because the light on the usb is off). The only remaining option once in the black screen is turning the pc off.

Thank you for your advice: I will open a new thread.