I have an Ipod 2g that is 4.2.1 it is an MB model. so i dl the firmware i have and i dl redsnow and i go through all the steps fine. then once i do the command prompts on the screen it goes to the next screen and gets stuck on please wait while your device is being processed and down the page it says waiting for DFU device. idk what to do if i touch my ipod at all or unplug it i get the blue screen on my computer