hello bmw owners

ive a problem with my 1994 e36 318is coupe alarm and i dont seem to be getting anywhere on e36.com so i thought id try on here instead

basicly if i arm the alarm i get 2 beeps the doors lock then i get a 3rd beep which is exactly the same as the first 2

now the 3rd beep is not to tell me that a door is open as if i leave a door open i get a long beep

ive looked online and on a few websites to try and find a bmw alarm manual which would tell me what the number of beeps/led flashes mean like most alarm manuals do but i cant find one

the alarm is the early type with the one button key fob which has the bmw emblem on the button

cheers kev