Running Junit Test with DDSteps is throwing NoClassDefFound

Question

Hi,

I m new to Junit just started writing automated tests using DDSteps. Here is my code to load the data

package JunitTestPackage;

import org.ddsteps.data.DataLoader;
import org.ddsteps.data.support.CachingExcelDataLoader;
import org.ddsteps.testcase.support.DDStepsExcelTestCase;

public class ExcelTestCase extends DDStepsExcelTestCase 
{
private CachingExcelDataLoader excelDataLoader;


 public DataLoader createDataLoader() 
 {
  excelDataLoader = new CachingExcelDataLoader();
     return excelDataLoader;
 }

 public CachingExcelDataLoader getDataLoader()
 {
  return excelDataLoader;
 }

}

My test class is extending this class.

But I m getting an exception NoClassDefFound on CachingExcelDataLoader while running the test class.

Let me what am i doing wrongly.