You requested the URL:

http://nicemice.net/amc/photos/full/2002-05-12-231829-heintz-birthdaycake.jpg

The web server for the nicemice.net domain is www.nicemice.net. You probably wanted the URL:

http://www.nicemice.net/amc/photos/full/2002-05-12-231829-heintz-birthdaycake.jpg