if this is an aftermarket radio that is installed in your car then you might
not have gotten the right wiring harness when the radio wus installed
either by a friend or a shop. if it is an aftermarket radio try using the wiring
harness made for civics with keyless entry, if you got it installed at a shop
take it back and tell them to look at it.

if its the factory radio in the car then id say its time to swap it out for an
aftermarket one, unless the dealer wont charge you to replace & install a
new factory unit.

good luck,
hope this helps