Hi Seetesh,
I feel check the class declarations of the ActionMappings and FormBeans while writing the classes they need to be "Public" bcoz i faced the similar problem and was able to solve by the above method.
other wise do check the web.xml in the
struts servlet declaration does it have config param with the appropriate path where the struts-config.xml file is located.
I think above two observations should resolve ur problem.