Are you sure you're logged in to Showfax correctly? I'm not sure what the problem might be otherwise.
In the worst case scenario, can you screen cap it and print that?
Note that these instructions are for a PC. Not sure if it's the same on a Mac.
To do a screen capture, have whatever you want on the screen (i.e. the visible sides), press the "Print Screen" (possibly "Prnt Scrn") button somewhere on the upper right-ish of your keyboard.
Open up a graphics program like MS Paint, then "edit" -> "paste", and voi la, you should have a snapshot of whatever was on your screen. You can then print that.
Not the best solution, but an ok option if nothing else works!
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"The world is my country, to do good is my religion." -Thomas Paine
"I'm a great believer in luck, and I find the harder I work, the more I have of it." -Thomas Jefferson