first off, you don't need the breeding trap. they are meant to hold the female just before she gives birth. but really, these things are too small and can quite often end up stressing the fish too much. your best bet, as said, is to get one male for every two females. this will ensure breeding, but also helps to keep the females from getting too stressed out. guppies breed like rabbits and need little encouragement on your part. check out the pinned article in the livebearer section for info on what to look for in a pregnant female (yes, the pics are of platies, but the same hold for guppies).
also as mentioned, have plenty of plants to give the new fry a place to hide, otherwise they may be eaten by adults. a breeding net is not a good place to put the fry. if you do catch them, its best to move them anotehr tank. one trick i used, since trying to catch them with a regular fish net didn't work so well, i use a turkey baster and just suck them up then squirt them gently into their grown out tank.