Need support with a skin with multiple floors

[jimsalabim]

Hi guys,

I´m just working on several projects for Kindergardens. I built a skin with buttons for each floor and everything works smoothly except one thing: when I have a hotspot at stairs, leading to another floor, the floorplan automtically changes. Problem is only, that the highlighted floor-button does not change automatically. Can anybody tell me how to do this? The tour is here:
https://360.inakindergarten-bildarchiv. ... index.html
and the skin is attached.

Mille mille grazie!