I've got the same exact problem with a similar set. I've got the 2015 Impreza, with the EVO-One and RF642W kit. As soon as the remote start is active, the RF kit is ignored other than beeping and light flashing when I push a button. What I'm also fighting with is the fact that the kit will not lock the door after remote start. Regardless of what options I change in the programming it beeps and flashes lights, but it doesn't flash the Blue light on the EVO or lock the doors. When I enable C1 in the programming, it also crashes the CANBus connection and I get a host of many error codes back from various ECUs throughout the car. Multiple Master Resets on the Bypass and Remote Starter have not fixed the issue. I'd also appreciate any guidance from Fortin on this one. It's really troubling as I essentially have a car stuck in the garage that I can't use because of this at the moment.