facing problem with jar
hi is there any one who can help me immediately?
I have developed an application previously, using jbuilder9 and jdk1.4. but now i am using jbuilder2006. and jdk1.5. after developing the application i have tried to build executable file and my executable file runs without any problem but the jar file didn't work. the system shows a message "Invalid or Corrupt jar file". I don't understand why the jar file is not working. I currently use jre1.5 but previously I used jre1.4.
plz help me.

