You can connect to the ASIAir via Wi-Fi, then link the ASIAir to your camera, and control it using your phone. The image I posted earlier was taken using PHD2 connected to the camera.
The reason you couldn’t start the camera is that you incorrectly replaced the DLL file. You’ll need to download and install a fresh copy of PHD2 to restore functionality. Additionally, PHD2 currently only supports ASCOM drivers, and the ASI ASCOM driver on your computer is an outdated version—you’ll need to update it to the latest one.