Hey Crackpirate,
The Sequence works great on controllers, the problem is with the keyboard and mouse sequence. The player should be alive, press and hold the three letters at the same time for about a half a second or so it should work. Could you try plugging in another keyboard and testing? Also are you on the latest version? I havent been sure how to do the codes on PC. I want to avoid a typing letters thing but it's looking like the direction I have to take. if you can think of anything for the cheats or cant get it to work, let me know i'll try to help.
Thanks,
Rafi