people still seem to get insanely confused
'd say its not your wording that confuses them, but rather the event of an error window popping up when expecting a game to start. after all, users are slipping their minds into 'game time'-mode when clicking that icon; getting the brain out and back to 'windows mode' cold turkey is always harsh.
my guesses for a better solution, none of them tested:
- use of big shiny animated images
- making the error message fullscreen & game-like (e.g. white futuristic font on black background)
- if windowed, include punch-the-monkey banner
that last one was supposed to be a joke, but on consideration, i seriously think it could improve the usual panic!quit!whatwasthat! user response in some way.