My client has had simular errors about a month ago. Need more information: What version of java are you using? What version of jdbc are you using? What platform is you client running on? What platform is db2 running on? I check back in an hour or so?
Quick fix: rename the .zip to .jar and put it in the [ TOMCAT_HOME ]/common/lib directory. Yes, Tomcat maintains its own 'classpath' (it actually has multiple ClassLoaders to manage borders between applications) and can automatically load archives. The problem with loading these archives is that it will only load jars and not zip files. What you should do is rename it .jar and put it in the [ TOMCAT_HOME ]/webapps/[ CONTEXT ]/web-inf/lib directory. The difference is that the original fix will make it available to ALL web apps, the second will only make it available to a single web app. The second is the preferred solution. Dave