I just received my 5 in 1 Sensor model 01536 / 8900123 and after setting it all up the base does not recognize the outdoor sensor. I made sure the A B C matched on both devices and even tried all 3. I followed the manual step by step in the proper order of taking the batteries out and back in the way they said. Still does not recognize the outdoor unit. I have brand new Duracell batteries in both units. Any suggestions??