Remote not working.
 

Hello I have a 2004 mpv and today opened it with the remote when I tried to use the remote to lock it nothing happened, replaced battery but no joy. What I have noticed is that the alarm is not working now and the sensor light is not on, I can use the spare key to unlock and lock wagon. I have tried the reset of the remote but that is not working so can anybody here help me out.
Parkwood.