alarm fob help

is there anyone on here that plays with alarms??

i have an aftermarket alarm on my 5 which has a fob on a key ring and a slot in the dash which has two contacts on it, u make contact with the fob and the slot and the alarm dis-arms :)
but for some reason (im guessing the fob is knackered) its not dis-arming so does anyone know a way in which i can either bypass this or remove it??

iv tried ringing a few alarm places but they say they need to see it but it wont start to get it there :rolleyes:

just thought id ask before i go attacking it and setting the alarm off :ashamed:

all i know is that it is a laserline fob??

any thoughts appreciated