Please make sure you are replacing only Compustar remote model 2WR35R-FM. Even though it may look similar, it may not work as a replacement for other Compustar remotes
 
Compustar 2WR35R-FM 1B 2-Way, 3000′ Remote
3000 Foot Range – Frequency Modulation Remote (FMX)
Water resistant/durable remote casing
Compatible with antenna part ANT-2WFMX. May not work with other Compustar antennas