Bit of a weird one this!

Car is a MK1 VRS

Battery went flat over the weekend from not using the car for a while. Gave it a bump and all was fine. When i press the unlock button once from the key my door opens as normal, But when i press it again it should open all the other doors including the boot but doesn't? If i go inside the car and press the button from there it works fine.

I've had the battery go flat before and this hasn't happened, any ideas?

Thanks

I'll take that as a no then lol

The only easy thing that comes to mind is to disconnect/reconnect the battery.