I use the same receiver, but I have only used TTN6 and iguidance 3. Both allow the selection of the avialable com port (I chose Port 2). If there is no way to do it you kay want to switch the AS port to 2, 4, or 0, and then use the default AS port (port 5) to fix the problem.
Device: HTC Tilt2
Rom: 21684 (Standard)