Plutonium

PLEASE SOMEONE HELP!! i whitelisted the file, disabled my anti virus tried downloading again and putting it back into the t6r file, but it keeps getting remove idk what to do please help

When i make custom classes to use in custom matches with my friends, and i select them, it says itll get selected next time i die or if its the start itll just choose a pre made class, i can never use mine. pls help!!