rear park assist has never worked since I installed it

[blueroseremodeling]

I bought a kit from Infotainment for the rear park assist over a year ago (I really wanted to do the front ones but they didnt have that at the time). Anyway could never get them working. That being the case I left it and when the front came available, I got that and set it up. (not as easy to install as the back, however with some adjustments with Alfaold I got it working. Still not the back though. Changed the PTS controller to the newest one and checked the wiring, no problem I also swapped out each of the sensors to the front and no changes. Any thoughts?