Let's make sure everything works. Open your favorite text editor and put in these lines:

func main : IO =
    println "Hello, world!";
    quit

Now hit the command line and type this:

$ funkycmd hello.fn
Hello, world!

There we go!

It should work. If it doesn't, go back and see if you set everything up correctly. If you did and it still doesn't work, file an issue.