The problem with the right stick on the emulator

In General, the game dark souls 3, I put the x360 emulator, for STD, after 17 hours of play, the camera began to lag, I have turned the stick up or down and he was drawn and hung at the bottom, to tear it it was impossible, only the move right and left, I went to configure the Drava and there was a problem when I pull the stick down, it comes to end sharply moves up and stays there until I let go of the stick.
What to do?