Name Mapping in Android

Hi all, newbie here, just getting to grips with test complete and I can't seem to get name mapping to work.

I'm connected to a physical device, click Map object from screen, I can pick an item from the appium tree and ist shows me something like

Mobile.Device().FindElementByXPath("//ancestor::*[*[@text=\"Device ID\"]]")

I click OK and nothing happens?

Any advice?

Thanks

Stephen.