EXS24 Round Robin functionality in Logic X

Hi all

Can anyone help with creating round robins within the EXS24 in Logic X.

The manual attempts to explain how this is done but not successfully.

Following step by step appears to miss out the fact that you have to create a group for each "Zone" and then use those groups in your "Select Group By" menus.

But even including this additional step does not give you the round robin effect.

Any help here?

What am I missing

Many Thanks!

Logic 10.1.1

Yosemite 10.10.4

2.6GHz- i7 - 16Gb Ram