you didn't. This is the easiest way and it will fix it. 1. you are on the black screen. 2. open task manager. 3. End process's Ipodservices.exe and applemobiledeviceservice.exe 4. with the phone STILL plugged in (that means it should have already been plugged in) hold the power and home buttons. 5. wait for the first sound from your computer, the normal sound you here when you plug in a usb device. Then let go of the power button but stay holding the home button. 6. keep holding the home button until the second usb noise, then you are safe, and you can continue the jailbreak. if it doesnt work, make sure you repeat step 3 and that will shut off the ipod so you can try and put it in dfu again.