I change the colors and still no colors displayed on the screen. What to do ?

You're changing it in the .cs file. Change it in the lang file instead. Try to NEVER alter the .cs file unless you're sure you know what you're doing.

Even by changing the .cs file, you can simply delete your old lang file and load up the new one with the current key values and there would not be a problem. I'll update the plugin momentarily.

ok thx