I have a problem.

[Sena Selona]

I make a sky box, and after a few min it put it back in my last and found folder, how to solve it?

[scdaluz]

Do you own or rent the land you are placing it on?

[Irene Muni]

As scdaluz says, if you are building in a land you don't own, the Autoreturn system return your objects afetr the time allowed for build in that land.

[scdaluz]

Yes, this is why I asked if you own or rent the land you place it on.  If you need help finding a rental plot to place your skybox please search for land rentals, keep eye on monthly price in Linden and also the prims count as these will be important factors.  If you need further assistance, let us know

[Sena Selona]

If someone is intrested alow me put it on your land. Please let me know.