Small issue: Exception in running java class

I have created a java test.class through Eclipse in some workspace. This class is using mail.jar. It is working fine with eclipse.
But if i copy test.class and mail.jar to c:\ and try to run it. It is giving me runtime exception stating
"Exception in thread "main" java.lang.NoClassDefFoundError: test"
~Aman

You can try java -cp .;mail.jar testWhich should be OK provided that class test is not part of a package, and
that compiling test.java did not result in other .class files.

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