Is your device rebooting when RSD Lite is finished? If it isn't push "Show Phone" when it's done, whether is says failed or not. This should work for you.
What do you mean by push show phone?
My bad, it's actually "show device", there is "..." then "start" then "show device". After you load the sbf click "start" then when it's finished, whether it says failed or done, push "show device" and it will reboot your phone.