problem from 3G to Wi-Fi

[elle2286]

Hi, I've installed Adblock Plus on S4 mini (GT-I9195); it works with Android KitKat 4.4.2.

The app seems works ok, but I've found a problem: when phone should swap from 3G connection to Wi-Fi, it doesn't find automacally the Wi-Fi. So I have to control the connection and do it manually.

How can I resolve this problem?
Thank you very much.
Erica