java.lang.ClassNotFoundException: org.apache.commons.digester.Rule

This is not a new question, but Im help/clue less... so asking it here... Im getting the error "java.lang.ClassNotFoundException: org.apache.commons.digester.Rule" when Im trying to run a DynamicReport sample project. My specifications are below: Java - 1.7,commons-beanutils-1.9.3,commons-collections-3.2.2,commons-digester-3.2,commons-lang-3.7,commons-logging-1.2,dynamicreports-core-5.0.0,jasperreports-5.6,jasperreports-javaflow,

code snippet is below:

// import statements
public class sampleReport {

public sampleReport() {
    build();
}

private void build() {

    try {
        JasperReportBuilder report = DynamicReports.report();
        // a new report
        report // create new report design
            .columns(
                // add columns title, field name data type
                Columns.column("Item", "item",
                    DataTypes.stringType()),
                Columns.column("Quantity", "quantity",
                    DataTypes.integerType()),
                Columns.column("Unit price",
                    "unitprice",

                    DataTypes.bigDecimalType()))

            .title(Components.text("Getting started report")

                .setHorizontalAlignment(HorizontalAlignment.CENTER))
            // shows report title
            .pageFooter(Components.pageXofY())
            // shows number of page at page footer
            .setDataSource(createDataSource())
            // set datasource
            .show(); // create and show report

        // show the report
        report.show();

        // export the report to a pdf file
        report.toPdf(new FileOutputStream("c:/report.pdf"));

    } catch (DRException e) {
        e.printStackTrace();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    }

}

private JRDataSource createDataSource() {

    DRDataSource dataSource = new DRDataSource("item",
        "quantity", "unitprice");
    dataSource.add("Notebook", 1, new BigDecimal(500));
    dataSource.add("DVD", 5, new BigDecimal(30));
    dataSource.add("DVD", 1, new BigDecimal(28));
    dataSource.add("DVD", 5, new BigDecimal(32));
    dataSource.add("Book", 3, new BigDecimal(11));
    dataSource.add("Book", 1, new BigDecimal(15));
    dataSource.add("Book", 5, new BigDecimal(10));
    dataSource.add("Book", 8, new BigDecimal(9));

    return dataSource;
}

public static void main(String[] args) {
    new sampleReport();
}

Any help is appreciated.