this beater thing is beating me! lol Help please!

this beater thing is beating me! lol Help please!

One of the beaters on my mixer quit working shortly after purchase. I finally went back and just bought another one thinking it was just a fluke. Nope, it too will not hold a beater. One side will but the other just won't hold!!! HELP!!!!' I'm beginning to think it's just the way the thing's made maybe. Anyone else have this problem????