Hey Hanif, Looks like you are using the
tomcat server. Check your classpath to be set correctly and that tomcat-utilXXX.jar is in your classpath. The stated classs is missing in your classpath or you are deploying to an older version of the server, which does not have the stated class B2Cconvertor. Please look into your server/lib directory if you don't find the class.
Hope this helps!
Cheers!