Javamail Exception in thread "main" java.lang.NoClassDefFoundError:

[Jeff Dube]

Hi all,
I need to use the javamail 1.2.
I downloaded the sun version of javamail1.2 and jaf1.0.1 and added the mail.jar and the activation.jar files to my classpath. I do have everything needed but when i run my program "java msgsend -o ....." i get the following error:
Exception in thread "main" java.lang.NoClassDefFoundError: msgsend
Did somebody know what can be the problem.
Thank you
jeff