Sounds like your battery is no good, my wife had the same exact problem with hers and after checking her charging system, I swapped the battery with mine, 2 days later the same battery was dead again. If it won't take a charge from your trickle charger then your battery voltage is probably way to low for it to take, once a lead acid battery gets very low, say 1-3 volts the chance of it recovering are usually very slim.