I FOUND A SOLUTION!!! 

What i did?

1° Uninstall the game, delete all files in that folder. Then use C-Cleaner and restart the sistem (optional).

2° Re-Install the game in other different folder. Did all the same things again.

3° In this case i just installed the skins. All woks perfectly!!

 Now i can change the bot difficulty with the command. I guess my error the last time was install DeathMatch maps, and i knew the normal install doesn't have this game mode =)... I'll try to install normal maps, mean "BombDefuse" and "Hostages" game mode.

 Yeah, i know... I'm an asshole!!

 Sorry for the misunderstanding, and thanks for take a time and try to give me a solution =)

 Greetings!!

 Thanks for the reply!!

 Yes, i did everything like in the video, and read all the instructions. Installed the game in a folder, then copy the patch in that folder, executed the patch, changed the language in the rev.ini file, installed the maps pack, added some skins and other maps... nothing else.

Don't know where I wrong LOL! I'm pretty surprised, too.