How to obfuscate my code with proguard?

Question

I'm trying to obfuscate my java code with ProGuard (5.2.1).
I'm using LWJGL in my project.

So i execute proguardgui.jar and when the window is open, i do :
- Click on "Input / Output."
- CLick on "Add input" (choose my jar file etc...)
- CLick on "Add output" (type "PWdd.jar" etc...)
- Click on "Next" (5 times)
- Click on "Process!"

That's the answer of the program :
http://whiteplay.fr/help.html (I had to make an html page because StackOverflow have a limit of lines in each questions :/)

Do you know what have i to do ?
PS : The program (The input jar file) is working before the obfuscation.

Answer 1

Ok, because i used eclipse, when i exported my jar file, i choosed to include jar lib to my jar projetc. If you choose to put them into a folder neer the project jar it's working :D