Lakka 2.1.1 + Raspberry 3B Plus + RGB-PI Help

Hi,

I have followed next instructions to use the RGB-PI cable with my Raspberry 3B+ and stable Lakka 2.1.1:

http://www.lakka.tv/doc/CRT-Screens/

I have put rgb-pi.dtbo file in the overlay folder inside the micro SD card through Windows Explorer and edited the config.txt file:

Original config.txt:

How I modified the file:

but I don’t see Lakka on my TV. I am doing something wrong? Can somebody help me?

P.D: With original config.txt file and HDMI connection to a PC monitor Lakka works.