After waiting for them to charge up for a while, they worked. Then, since we would not need the sound system for more than an hour, we shut it down. I learned that was the wrong move. When we turned the PA on again, the mics did not work. All indications on the meters said that they were working, but no sound came out. AARGH! Apparently they lost their charge or something.
Then he made the same mistake we had done in the women's club meeting. He turned off the wireless mics in the choir loft. When he turned them on again a few minutes before the meeting started, they did not work. He fussed with them for awhile and told us that we would have to be very quiet during the meeting because the mics would be "hot" the entire time.
I have to say, that I much prefer hard-wired microphones in situations like this. Unless you have professional sound engineers at the ready with all of their knowhow and tools, wireless mics seemed to have more potential problems than they are worth!