immobilisor

Hi, Wondered if someone could help. Got 2001 1.9TD T4. Most of the time it's not a problem, but then every now and then, we turn the key, wait for the lights to go out, theres a bleep (assuming from immobiliser) and then nothing. No turn over. Thought it might be a problem with the Key...

Hi folks, hope someone can shed some light as to what the problem could be with starting the van. Drove to work yesterday morning, no problem, finished work at 2 went out and van would not start, turns over but not firing up. Got out, locked van, unlocked van tried again, nope wouldn't start...