when i lock or unlock my car with keyfob it done work! and when i use the key its works fine evreytime

when i use the fob it makes the right noises like its trying to work but doesnt! also i think its standard ford fitment from factory upgrade thats what ive been told! grey recangular fob and has two grey buttons only thing i thot it was maybe old style cobra fobs as that what it reminds me of!