Mount bracket for pressure expansion on drywall?

[Joukko]

I can't type anything in my second post for some reason. http://www.byggahus.se/forum/byggma...ra-faste-till-tryckexpansion-pa-gipsvagg.html

I can't reach the upper stud, only one (the lower) stud. What should I do then? I will put up a board that is 145mm x 21mm and 55cm long.

Jocke