I am sorry to say but you might be out of luck. What system menu do you have...4.2? If so then you deleted your system menu IOS... if this is the case then savemii will not work. (is the wii korean?).
Do you have bootmii installed as boot2 and a nand.bin backup? How old is the Wii?
Edit: Moved to the brick section of the site.
Give any more info that you have.