Program not executing in jar file. Help please.

I went through the tutorial about jars on the sun website and i created a jar file with a hello world program like this:
"cd E:\Batch
jar cfm test.jar m.txt test.class
PAUSE"
My m.txt contains this text:
"Main-Class: test.class"
The jar file is created. No errors.
Then i try and run the jar with this:
"cd E:\Batch
java -jar test.jar
PAUSE"
I get "NoClassDefFoundError: test/class"
All the dos command are run form batch files and everything is in the same directory.
I've searched around google and this website for answers but i have failed to find anything.
Does anyone have any suggestions i can try to fix this? I've ran out of ideas.

Ah thats what the problem was. That was driving me
mad thanks. So whatever you put in a jar file must be
in a package or you can't run it.
Message was edited by:
JahvahNo. You can also not put it in a package, but when you specify the main-class attribute in the manifest file, be sure that you don't tell it that it is in a package.

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