if you open log you will see that everything is fine except download of "images/zal-2.png" failed.
Catch is that file name (-extension) and hotspot name should be the same.
I suggest you change hotspot name to lowercase and change image name also in lowercase name and all will be fine.Example:
->http://3dsi.ru/panorama/sm/images/Zal-2.png -> http://3dsi.ru/panorama/sm/images/zal-2.png
You are also missing thumbtext3 text style definition. That's why your text is not displayed.
Hi,how to use this method for layer(not for hotspot)?