I have a problem with downloading some apps on my Gear 2

[Sead Pasic]

I bought a Gear 2 today.I connected it to my Galaxy S4 and tried to download Fleksy Messenger.It started installing and then a window popped out saying:
Error
Installation failed.Try later(0)
Runtastic PRO,5-Tiles SMS Text Messager,Appy Geek and News Republic had the same issue,while 2048,My Calculator and PacMan installed and worked fine.
Can anyone help me?
Thanks,
Sead