3l Boxer 2009, horse box conversion. Using the LX key, unlocked, inserted key, half turn, all dash check as usual, turn for ignition and all cuts out, as if the immobiliser has engaged. Key wont then lock the door, no power. jumped it with no prob, runs fine, then 3 days later did it again. And 2 days later again. I thought I might be pressing the lock function on the key as I turned it and this was somehow related, but yesterday did it with much care and clunk. Spoke to Equitrek who did the conversion and they know nothing, my garage trying to get it to do it again. Any ideas I can pass on to them?