Issue on Network assignment

Dear experts,

My requirement is to create few network heads under projects definition,. Networks having activities which assigned to 2nd level wbs elements of the same project.

Im using activity assigned networks.

Configured project profile u2013 plg board/dates tab u2013 network assignment as 1(project definition) & also project is defined to be in one root.

When I select wbs element & create activity, network is created & assigned to that same WBS element that I have selected, But I want network to be attached to project definition & activity to be assigned to WBS.

Please advice how I can sort out this. your inputs are highly appreciated

Kind regards,

Sam L.