Hi. I just received my A2 remote (not the light) and I have U1 box but I can't seem to make it work. Not even on off. The remote shows some light so batteries should be good. I tried two sets and Fn button light can switch on. I only put USB thing into the ports of the U1. Tried all three. Seems to not be able to react. Did I buy the wrong remote??? Does only the Light remote work with U1? Not sure if I should return the product to Amazon or whether this can be made to work? Appreciate everybody's input here. Please help.