DynamicSaxHandler missing in xml file

[MusaJTaib]

Hi I am very new to this so not sure if it is maybe my fault but when I try to run the Hello World code. I get the error Exception in thread "Thread-0" java.lang.NoClassDefFoundError: de/topobyte/xml/dynsax/DynamicSaxHandler. I have downloaded the correct version of the Jar files and the xml file does not have a class named DynamicSaxHandler.