I added sample quest in the solarus-launcher.exe, clicked [play] button but no response. Also I asked my friend to try it too, my friend's computer is no problem running sample quest, but mine's not. how can i fix it? 

[Christopho]

Are you able to run other quests?

no . i tryed yarntown , also no response

ok i got it. i created a new folder &it's default name is Chinese changed it to english, now it's runnable. 

anyway thank you!