Riivolution Not Working

[Ali21066]

I wanted to get NeoGamma working on my Wii so, i had my friend reinstall custom IOS because some of the IOS files or missing. I don't really know the details but, after he got NeoGamma working my Riivolution has become inactive. When it starts up all it says is "INSERT SD/USB". I've heard of a solution that says to format the SD card i did it but sadly it didn't work. Someone Please Help me out.
Thank You!