Hai thank's for user suggestions.
Yes there is a mistake in my Initial Context Factory that is case sensitivity i.e. I used Websphere insted of websphere in the following context and port number for URL is 900.
com.ibm.websphere.naming.WsnInitialContextFactory
iiop://localhost:900 Now I am able to run my application on WebSphere 4.0 Single Server Edition.
The Initail Context Mentioned as
com.ibm.ejs.ns.jndi.CNInitialContextFactory
is also correct but it is deprecated that's why I used earlier one.
Thank's one and all for your help.
Bye
Venkat