Android: Object to XML with XStream

I want to serialize object to XML in Android with XStream. But even simple codes crashes.

 Person person = new Person();
    person.name = "Joe";
    XStream xstream = new XStream(new DomDriver());
    String xml = xstream.toXML(person);
    Log.d("xml", xml); 

This is class person:

class Person {

        public String name;

    }

And problem is that it can't find XStream despite that I download library and place it properly. Other problem is that, when finnaly Eclipse finds XStream I get errors in this lines :

String xml = xstream.toXML(person);