Audio Research IR input


Hoping another owner can help me out. Trying to use a remote IR sensor on a REF 6 and can’t get it working. Is there anything specific that needs to be done to recognize the sensor? Tried support at ARC and have not heard back. Thanks in advance.
adstew
I'm doubtful about the necessity of a mono mini plug.  A "stereo" mini works fine for the 12V trigger so should work fine for IR. 
Thanks for all the responses. That is the sensor I tried. I also tried the 38 hz version. Talked to Audio Research this am. They were helpful and I will post what works shortly.
Well, have tried all the above on a ref 6 and ref 3 phono with no success. There must be another way to activate the sensor. Need to get back with Audio Research after the holiday.