I am using EXIDE Automatic Charger with (1) deep cycle Maintenance free, and (2) 12-volt 60A Eng Start, on my LEXUS LS430. But, I won't be able to have any response, not even any light or sound of ignition. My battery is less than one-year old, and LEXUS dealer said that the battery works well two-months ago. Please tell me what you think I should do.