Don't Detect PS3 Pad

You should also know that just plugging pad to usb dosen't mean that it'll work properly. Just as ssshadow said you need to choose xinput, and to get original pad to work properly witx xinput you need to do sth like the guy in following video https://www.youtube.com/watch?v=x_VzPpFHbCw

I Active PS3 PAD Whit Motioninjoy And Working PS3 Pad In Other Emulators but When choose Xinput don't Detect PS3 PAD Button