#28 DBAN will not boot

[zom bie]

I press F12 when my laptop starts to enter the boot options screen. Select USB, then wait a few seconds before seeing the boot options screen again with a message that reads "USB Failed".

Notes:
I burned the dban iso ("dban-2.3.0_i586.iso") to USB using this guide
My laptop is a Toshiba Satellite Pro L670-189

Please help! :)

-Sam