V35 Coupe Alarm Sometimes Not Activating?

[Memz]

Hey guys,

As the title states.... my 2003 V35 350gt alarm sometimes decides it wants to be active when I lock it, then sometimes isn't active when I lock it.

Easiest way to explain it is when I lock the car, come back later then tried to open doors and alarm went off (great!)

However when I decide to try it again and come back later to open door the alarm doesn't sound or go off?

I have been told the V35s come with factory Nissan security however mine came with what I think is an after market alarm or immobilizer with a key fob?

Have uploaded some photos as attachments with what currently is the go.. key, key fob, and a little switch and press button thing which I assume the fob connects to?

Unless I am doing it wrong I just lock the car as usual with lock button.

Don't really know what the use / how to use the other key fob and switch so any help would be greatly appreciated!

[nickcorr]

Looks like a touch immobiliser to me...

When it was new, you would not have been able to start the car without first touching the contacts from the middle pic into the socket in the right pick...