Has the device ever successfully booted up? Upon initial boot up the device will get stuck looking for "POAP", automatic configuration stuff, to break that and continue boot up you have to type "N" and hit enter. By default the boot variable is not set, so once it goes into the boot loader, you have to type "boot nsox xxx.bin" boot to .bin file you loaded in the bootflash: directory. Once the device boots all the way up, you have to set that boot variable. To set the boot variable if you have a kickstart file, type "boot kickstart bootflash:kickstart.bin system bootflash:file.bin" changing those to the appropriate .bin files in the bootflash:
