What's wrong when my queen ant isn't doing anything?

A queen ant usually flies to mate, once they have mated some species will continue to fly to find a site for a new colony. Once the queen finds the right place she then removes her wings and lays eggs and raises them. read more

The most likely answers is that the queen ether didn't successfully mate or that the queen would have rejoined her original colony and had worker ants raise the eggs. In some species of ant the queen ant in order to produce a functional colony must mate with one type of male to produce workers and a second type of male to produce queen ants. read more