New to Java

I am VERY NEW to JAVA SE. I have written several small applications, each with a swing library. I am using a MAC computer OSX 10.6.3, and NetBeans 6.8. The applications run fine within the IDE. However, when I copied the "dist" folder to the desktop and tried to run them in either the terminal or X-11 terminal window, they would not run:

From within the terminal window, I first changed to the desktop, and then entered the following:

java -jar "MyApplication.jar"

I got an error message "Unable to access jarfile MyApplication.jar

I also tried to run them on a PC running XP Pro through the CMD window and was unsuccessful.

I got the same error message "Unable to access jarfile MyApplication.jar

I then ran one of the applications through "Jar Bundler", and created a folder called "MyApplication.app". Again this would not run on the desktop of my MAC. The ICON would very briefly flash on the DOC, and then disappear - there was no error message.

Obviously something is very wrong, but I cannot figure it out.

Any thoughts on where to look would be appreciated.

Thanks.......

Bob