I just got my ebay triggers, this may be a dumb question, but after I installed the battery, nothing happens. I put the battery in the reciever, and Im guessing I put it on L or W but the light on it doesnt come on. Am i missing something or did they ship it with a dead battery? Also, the little button on top of the transmitter just flashes once when I pres it. any secrets here or does it just know the reciever is turned on?

