Design Assistant didn't work with project export for DGN-SSS2 TIER Persistence

I use the Electric Data Modeling Administrator to export my own project and load a Expect Designer database.

When I export a project for DGN-SSS2TIER persistence model and open the Expect Designer and try to place new feature in the Design Assistant, it doesn't create work point or path.

I tried to export a project for DGN persistence model and the Design Assistant worked fine.

My question is how to export a project and load database for DGN-SSS2TIER persistence mode?