Far Cry 3 Cheats doesn't work

Hi guys! I just download the new Infinity and when I want to start the Far Cry 3 Cheats it doesn’t work ’ We’re having trouble starting or finding your opened game’. And I want to mention that I bought Far Cry 3 on Uplay.
Can someone help me please?

Run the game then attach infinity. Does it work then?

No …it doesn’t work. Here is a proof:http://prntscr.com/festw8