I don't think it'll work correctly with ppjoy. PPJoy is essentially a proxy application for binding several controllers into one so that the game can use them since the code only recognizes one logical controller at the time, but force feedback is handled by device drivers, and ppjoy acts as a bridge between several devices and the game... so it can't know what force feedback it should be using.
Try removing your steering wheel/pedals and then try with directly selecting your FFB Hotas device alone in the Launcher.
Another
possible solution would be that the game is sending FFB to the device that happens to be first in the list of controllers. There are ways to change the game controller ID, so you could try and make sure that the FFB Hotas controller has the controller ID 1.
Setting it to "preferred device" from Control Panel -> Game Controllers -> Advanced could work, but I actually recommend getting
JoyID utility from WingMan team, that should let you manually change the ID's of multiple controllers you might have.