Note 4 5.1.1 custom kernel

Hi guys i have a note 4 running on android 5.1.1 and I tried to root it with custom kernel the googy max kernel rooted my phone but when every time I reboot my device all my WiFi networks on my phone get forget I hope u give me solution :)
My note 4 model number is (SM-N910H) (EXYNOS)