ZBrushCentral

zb4 timeline -how to animate layers instead of layer

hey people
i have a timeline issue and documention failed to give me a clue.

i enabled the layers track(under enable), have it active(under edit)

so first i do sliderchanges on several layers first, when i have my pose i switch from layer to layers in edit to set a keyframe or all layerstates at once in the timeline which is my intention but it will not work.
if i scrub the timeline after setting several keys nothing was recorded. what might i do wrong?
thx in advance