Hmm... Are your games in foreground ? Have you tried windowed and full-screen ? Is the "On-Off" button turned On ? (Sorry if my questions seem dumb, I have to ask them if I want to distance-debug ^^)
No problem! I understand these questions are essential.
So I got it working by changing user permissions for both dark souls and the tool. I also had to change all inputs to "holding" as single inputs weren't being read by DS (may have something to do with my PC not being powerful enough?)
Thank you for the reply. I hope that this comment can eventually help someone with the same issue.