I've changed the renovation status of the stair nothing happened, i didn't know that the treads have different renovation status, how can i change only the renovation status of the treads ?

I've tried different scales but it stays the same..

Everything seems to be fine but the treads are still not showing 

I'm using Archicad 25.In Model View Option, Stair 3D and Section is set on Full when i set it to Schematic the treads appear in the section but in 3D it looks strange.