Using apache.commons.cli with Java 1.4.2

I'm having difficulty using apache.commons.cli with Java 1.4.2. I used Eclipse to develop a simple program that uses apache.commons.cli. The program works within the Eclipse IDE. However, when I export the program as a Jar file and try to run the Jar from the command line (DOS or Unix). I get a NoClassDefFoundErrorerror wrt the CommandLineParser. (In another program that uses apache.commons.cli, running the jar file triggers  the NoClassDefFoundErrorwrt HelpFormatter. So, I think java punts on the first class it sees containing a problem.)

I also extracted the apache.commons.cli source and built a Jar from it. Strangely, I couldn't compile my program using my cli jar, instead on the standard jar. When I extract classes from my cli jar, I noticed some of the classes in apache.commons.cli are absent. I don't see anything peculiar in the source.