WBS determines dates

Hello,

I configure WBS determines dates to WBS scheduling profile.

Activities networks are assigned to a WBS level 3 and the nwtwork header assigned to WBS level 2.

Basic dates are maintained on WBS level 2.

My expectaion is to schadule network from the dates that was mentained at WBS level 2, but the system use the basic dates of the project definition.

Can anybody tell me the reasson for that behavior?

Is there any way with the project structure in the above that I can use schaduling with WBS dates?

Thanks &Best regards,

Nir