Yeah it's in a pool, I know it's difficult to get rich off of this. It's an Antminer S3 does my client have to hit a certain block or does it even matter?

  I've been working with Bitcoin for a few months now and have yet to mine anything. I'm working on this for a client he had the system set up 2 antminers I think one is malfunctioning,
and I told him he has to hit a certain number to see some results as we have done everything from resets, to unplugging and re-inserting to re-starting. We still haven't seen anything even
when I saw that the antminer hit the number to receive a profit. It's hooked up to a Mac System and he is pool mining. any help would be appreciated.