Hi all!I have made a web application using spring and spring-mvc 2.5.I also used jdk-5 and tomcat 6 for development.Now I want to deploy it in a live server which is tomcat 5.5 with jdk 6 and I'm facing several NoClassDefDoundErrors such as "java.lang.NoClassDefFoundError: org.springframework.core.CollectionFactory
".Is there a change to overcome such problems by replacing spring related jars with a newer version such 2.5.6?And in general is there something I can do about this kind of problems?-except changing live tomcat with tomcat 6.This is not an option at the moment - thank you in advance for your time