I just recently replaced the plugs and wires in my 04 DII. I got the wires from the local land rover dealer. My problem is the cylinder 7 plug that goes on the bottom of the coil keeps coming off at the coil. When I try to push it back on it doesn't click in. All I can do is press it as securely as possible and move on. I've tried two different wires. Is there anything on the coil that can be causing this? I am just trying to avoid having to pull the coils out because I have a feeling that requires major amounts of parts removal.