e36 Compact Key Fob, Randomly works

[minimike]

Hello,
I have an e36 Compact (318Ti) when i brought it i played around with the key fob


but i could never get it to work so it got thrown in the glove box and never bothered with it, however last night i was sorting out my glove box and thought id try it again, I kept pressing the red button and it locked and after pressing it many times it unlocked
holding or pressing the white button seems to just flash the hazards
(i think someone has taken the actual alarm out)

Really don't understand how it can work randomly but not other times, i replaced the battery in
the fob thinking that must just be dead but still no different. anyone played about with these?
would be nice to get it working.

Thanks
Mike