Execution Services on Network Element Level

Hi,

I have configured Easy Cost Planning to be available on Network Level. I also configure Execution Services to be available in ECP screen, but only on WBS level.

Now I need to configure Execution Services to become available for Network level Planning as well.

In Execution Services config there is a list ob Object Types to which I can assign my Execution Services. I only got Cost Centre, Onternal Order & WBS.

I guess I shall add Network Element... can't understand how...

Please help,

Thank you