Hard Problem Need help

[ndbpwet]

I think i have do the right thing to install rockbox on my ipod 5G video
But since i have installed it, it shows me only the first three lines of the rockboot
I have tryed to reinstall or to backup but anything works, I always have this message
Error couldn't not open : the specific file is untraceable

Only a reboot by menu+enter works, but it boots again on the same screen and i'm still blocked

please can u help me?