SketchUp to Unreal Problem

when i try directly SketchUp to UE4 with FBX file…

here is 3th basement floor of my project.

and it has 4 groups (floor,walls, ceiling and ramp)

then i export them seperately to UE4 with FBX file…

then i import it and build

here is the result… i tried all export options for FBX into SketchUp and nothing changed…

and this is the file of basement… only 800kb https://www.wetransfer.com/downloads/6b73d22707952c4eb8c8d2f3525b911420150521114306/fee92648d1fb638f24d18e6058c757d320150521114306/db3c2e