No one answered!
Anyways, my issue was trying to call classes in jar file from a a jar file! Easily done by adding the jar file containing the classes to be called in the manifest of the running jar file.
So fo example...A.jar contains some classes i want to call in B.jar. I create a manfest containing this line at the end
Class-Path: A.jar <cr>
Then I create B.jar .....jar -cmf "manifestfile" B.jar *.classes