My program works well when I run it from Processing, but I not when I
export it ( for Windows ) : the .exe file does nothing, my window it empty.
At the beginning, it worked fine, I added some classes and functions ...
and now nothing works.

Processing 1.0.9
Windows 7 - 64 bits

P.S : I tried to export it from Vista 32bits, and from ubuntu ... same result.

I hope you understand me, I don't speak fluently english

Sorry, I have forgotten to say that my program uses OpenGL and Minim Audio.

That sounds like you haven't set up your files correctly. In particular, my
guess would be that you haven't placed the sound files in the data folder,
so they aren't being exported properly. If it's broken across all of those
platforms, then it's not likely to be a Processing bug. Try getting some
help with the project at processing.org/discourse.

No, all the sound files are in the data folder. But you're right, my
program doesn't work across all platforms ... I'll try on
processing.org/discourse. Thanks, and sorry for the inconvenience.

No problem, and it may still turn out to be a bug, but I'm guessing that
there's something else happening in the code that's causing a problem. Of
course, let me know if that's not the case. Good luck!