I'm working on a java application that is obfuscated with ProGuard 3.8
i followed the tut of SND: Cracking_Java_programs_Part1_SND

about how to unpack that jar files and pack it back but it sadly it didn't work for me when i try to run the application (with out any changes to the class files) the application refuses to run.

can any one recommend me what to do ?