As well they should... that's not the theory behind how the beads work.
The beads do nothing to balance wheels/tires. What they may do is balance the effect that an out of balance wheel/tire has on your suspension. It is the up/down of your suspension that may be balanced, not the rotating wheels. Without a moving suspension the beads do nothing.
Note: I don't use them and likely never will for various reasons. I just wish that someone who understood what they were supposed to do would rig up a reasonable test. Putting a wheel with beads on a spin balancer that measures axle strain does only shows that the people running the test (yes, I'm talking about MCN) are clueless about how the beads could work. It doesn't help that the beads are marketed as something that will balance your wheels/tires. They can do no such thing.