I can run these samples by going to Samples | ArcGIS API for JavaScript and clicking on "View Live Sample" or "Explore in the sandbox"
but when I download them as zip and then try to run the html file that I have downloaded through my browser by double clicking on it, the kml, georss or csv layer doesnot load up at all. Does any one know the reason behind this? I am talking about these three samples although this issue can be with others as well but I never tried them,
CSV | ArcGIS API for JavaScript
GeoRSS | ArcGIS API for JavaScript