Help can't get stick to work

Hello all, I just bought the Hori real arcade pro Kai 4 for ps3/ps4. (It only has the ps3/ps4 button) but I read that it should work on pc also a couple answers from video reviews told me so.
Now I can get my pc to recognize it. It says it is working correctly, but when I load up SFV the stick doesn't do anything?
Anyone knows what the problem could be?
I have windows 7, don't know if it matters.

Thanks in advance!