Hi i install neogamma 7 succesfuly but when i install usb loader GX ,i got black screen what i have to do, i did not any usb device to my wii, do i need to do all the step mention on this guide in able play back up from the dvd and usb device , please advice me i am new for this i buy this wii last week and i updated to 4.2u , please help me?