Hi, I just received a Vamo V5, and am having some technical/maybe user issues. I followed instructions on how to switch modes, but this thing just won't cooperate! I can't even get it into the menu mode. Five seconds into pressing both small buttons, it shows "Set Lock". Even the screen is different than shown. Current watts are shown on top, with a battery icon, ohms and voltage down below. What on earth am I missing? I was looking so forward to getting this thing...Help please!