Your English is as good as anyone's
Sorry for yelling, but it's like 03.00 AM here, and I need some sleep.
Ok, what does the error message say? When you say "nothing works in dos", do you get any messages? Does Dos-Box jump back to the desktop? What happens? It's helpful to get the error messages.
EDIT: I don't know about that virtualization thing, but someone else may know.