Brawl Minus won't work on other wiis

[DrMcNinja]

So I have Brawl Minus using an SD card and it works perfectly on my wii.  But when I try using it on my friends wii (tried with two different wiis) it does not work. Is there anything I need to change or what do I need to do to fix it?

[The Light Music Club]

Did you make sure the wii's were properly hacked?