I am sure I have read about this before but after trying a search I could not find it. After using the upper setting to mount a kerb (slowly) I then parked and left it like this for a short while. When I returned the top and bottom lights flasshed on startup as they normally do but then did not stop and go off but instead after quite a while stopped on. I cannot make the suspension go up or down it just stays in high. I have tried pulling the battery an leaving then reconnecting but with no joy. Any ideas?