missing package

I have just installed NetBeans 5.5 and I have some existing codes that I would like to run with NetBeans 5.5, but I get this error: "package com.sun.org.apache.commons.logging does not exist"Can someone pls advice on what to do. Thanks
[256 byte] By [anjiiea] at [2007-11-26 15:01:11]
# 1
looks like your existing code is using some libraries(jar) files that you didn't include into your classpath. So you have two thing to do:1. find what jars you missed.2. add those jars into your classpath inside NetBeans IDE.
thebugslayera at 2007-7-8 8:50:06 > top of Java-index,Enterprise & Remote Computing,Web Tier APIs...