Ooops!

I was the pianist for this morning's praise and worship. Something went wrong, or actually it's also considered my fault. The last song's key was lowered, without my knowledge. We have buttons to transpose the keys higher or lower without changing what we are playing. I felt something's wrong when I hit the first few chords. Gosh, it's lower than usual! Then I looked at the bright red light on the left of the board. It's lowered. I can't do anything but to continue playing. Partly it's my fault because I should have raised the key first because it's a request from the singers.