hi bro i am using the translator so sorry if there is something wrong with the words
first you must verify that you installed olutonium in the folder where you have the code then you wait for it to be updated and after that you give setup and select again where you have the cod
after that you give the 3 points that are next to the play button depending on which mode you want to play you have to put the cod folder again XDDD are many cod folders
that's what i know
but if it doesn't work, try to see tutorials on how to fix it