Not been able to make connect opacities to work

[flcl00]

Hi all.

I am rigging a characters mouth using connector and then applying connect to opacities. The thing is that, everything works until I put a key on the slider. I move some frames forward and try to pick another mouth shape but then I can´t get another mouth in there. It only shows the same. I don´t understand what I am doing wrong :/

[Duduf]

Weird... Can you send me your project so I can have a look?