Now, are you trying to load something INTO a drawing, that is already done?
What format is it? Different models / components require diffferent methods of loading.
Import is the seamless method. You must only use the formats selectable. Failing that load the drawing in a new template. Ctrl+Shift+C will copy with a basepoint. go to a new template / drawing, and Ctrl+Shift+V to paste it into the new drawing. If sucessful, save the drawing and you are done.