Hi I think I left my boot open and it has drained my batter completely. I had the breakdown out this morning to boost it. It wouldn't turn over... on the dash it was a picture of a key with a padlock around it! he said the dead battery has wiped my codes off my key. I rang a locksmith and he said it might be something else... can't think to what he said now though. Anyone else have this problem before? Any help would be great. Thanks.