No problem, sorry I couldn't find a way to fix it.
Are you sure they're not working, tried putting some really wacky loadouts like all red tracers just to make sure? Observer rounds aren't tracers unlike what the manual says, they just make a puff of smoke where you hit. Only other thing I can think of is that maybe you used a character the game doesn't like in the name for the loadout? Pity about the H70, might have to have a look at the Antec Kuhler H20 620, since apparently it's much quieter if not quite as good at cooling.