Problems with keyless entry

I have a mk2 laguna with keyless entry, I have 2 key cards and have the same problem with both, app 2 months ago the keyless entry started playing up, instead of being able to get into any door just by pulling the relevant handle I can only get into the drivers door and then have to manually open the other doors either via the button on the center console or the key card, I have replaced the batteries in both keycards but still no difference.