my remote key it dose not work even after i ve replaced a new battery? on 2007 Volkswagen Passat

my second remot key it's only able to turn engin on but it dosen't unlock or lock the car i ve thought it might be a battery problem,i ve replaced a new one but the problem still going on

Asked by for the 2007 Volkswagen Passat
Might be defective , or need reprogrammed.