No network after using Multibeast

Hi everyone,

I was running El Capitan 10.11.6 with RLT8111.kext in Clover's EFI folder. But after I tried using Multibeast to install OC SSDT, my hack didn't recognize the network anymore. After a while trying reinstalling bootloader without any luck, I use Multibeast to install Realtek 8111 2.2.1. My network works now but sometimes it still show "not connected" status.

How can I go back to use RLT8111.kext on the fly like before?

Thank you!