I also ran into problems with the In-LineLinc Relay having trouble correctly sensing the output of the motion sensor.
Instead of replacing the motion sensor, I simply hooked up a 120V relay to the motion sensor. Output (red wire) to one relay coil connection and the other coil connection to neutral.
I then ran 120V Phase to one side of a NO contact of the relay and hooked up the yellow sense wire of the InLine-linc Relay to the other side.
The relay picks up when the motion sensor detects motion and in turn triggers the In-Line Linc Relay to sense a clean, switched 120VAC.
This works flawless with pretty much any type motion sensor. The relay can be purchase ad Radio Shack (part# 275-217) for less than ten bucks.
Teddy