Friends,

I need some help.
My remote key is acting crazy for last few days. Sometime everything works great with the remote, I can hear beep when all doors are locked.
And then some times, it does nothing. Even if I insert key in driver door keyhole, turn clockwise and hold, it locks only the driver door. All other doors are still unlocked.

A4 1.8T 2002

Does anyone know this problem? Any solutions?

Thanks,