Ok.. First off, I have an old Airtronics XL 2P radio and receiver in my XXX-NT. I bought a Cirrus CS-36 36 Gram Standard Servo with universal plug. I tried it out, plugged it in to my receiver, and it didn't work. Then I thought, ok, well maybe it needs the plug from my last servo I used in this car, so I then put on my other plug. Still doesn't work. I know I installed the plug correctly, and even before, it should have worked. Please help if you can. Maybe this servo isnt for R/C Cars? Thanks