series.module shows no items

Hello,
I did not found any answer to my question at this forum.

I made special category with few items and set it at config-series.
I made two pages with this category at series.
I made a node with *[series-info:center]* body content.
I have all pages published by default.

the result: is * *

How to create workin series???

Can you help me pls.?