kvr,
This will be caused by either missing JARs that you need to add to your build path or by circular project dependencies (I believe). I usually get this error when I’m missing a JAR or two. Right click on your project root node, go down to Properties, select “Java Build Path” and then click on the libraries tab. Here click “Add JAR”, and see if anythign is listed. This will only list JARs from your project that have no already been added to the classpath, so try and add everything you find and see if it works.