add these jar files to your library
commons-beanutils-1.8.2.jar
commons-collections-3.2.1.jar
commons-digester-1.7.jar
commons-logging-1.1.jar
groovy-all-1.7.5.jar
iText-2.1.7.jar
jasperreports-4.1.2.jar
commons-javaflow-20060411.jar
There may be updated versions of these files.