Hi All!

I have a problem with my alarm, it seems that I can't turn it on with my key(the button on it when pressed doesn't lock the doors or make a beep). I changed the batteries on it but it still didn't work. I have to manual lock my door by turning the key, but the security light comes on when I do it. My question is my alarm working and does anyone have any idea if the locking function is turned off? If so how can I turn it back on. I'm trying to the find the spare, but just in case it isn't the key are there any suggestions? Thanks.