I find youtube
reviews helpful in terms of figuring out equipment, I'm not saying you are necessarily doing something wrong (the clock may be broken in your
mod) but it's equally possible that you need some specific way to start it/get it going.
I know in some mods, the clock feature needs to be enabled/disabled as some folks don't want a clock running to drain their battery. So it might be worth taking a look at some
reviews to see if there's a simple fix for you, if you haven't.
Good luck,
Anna