I've downloaded gosu.  When I try to bring an image onto the window I get this error message.

C:/studio_game/Ben's stuff/load_image/load_image.rb:9:in `initialize': Could not load image ninja.png using either GDI+ or FreeImage: Unknown error (RuntimeError)

The program is from a tutorial and I find the same problem with various sampler programs.  I cannot get the image to appear.

Any ideas?