Ahoy there one-eyed Jack! it be me, I have a problem, mojo rising isn't working, and I'm starting to think it doesn't do what I think does, I'm now a level 65 and it never worked ever since I got it.
When you are killing the person that would activate mojo rising are you using a special power like mojo reaver or something like that? If so that is why. You have to do a reagular attack with no special power that you can choose.