Don't use Motionjoy for your PS3 DS3 controller on PC, the program is hideous. Instead get the drivers from Motionjoy and then get a program called Better DS3.
There is a vid on youtube with download links but you need the drivers folder from Motionjoy (32 or 64 bit), google will find them too. Update the driver for the controller in device manager and then run Better DS3 to emulate the controller. So much better and works great with emu..., ahem I mean elevators