I'm assuming you mean the W100 speaker. I have this and, yes it does snap into position. Check the bracket, it might be that you have it upside down. I did this when I first installed them and they wouldn't snap into position.
I thought the same thing, so I turned the speaker upside down and tried it that way, pushing left and right. Still no joy.
I have really pushed on it. Not sure what else to try??