Connection to the same access point

Unfortunately, this message is too generic. I found the problem to be lack of network setup, namely, Allshare. After loading a network driver and Allshare on a PC, I was able to connect a smartphone and tablet to my Samsung Smart TV:

Enter model # (mine was UN46ES7500)

46" Class (45.9" Diag.) LED 7500 Series Smart TV

Below Manuals & Downloads tab, select Software

Choose the Allshare (Software) (ver.x.x.x.xxxxx_xx), currently includes support for Win XP/Vista/Windows 7