Getting no results after parsing X12 834 file using x12Parser

I am banging my head from 2 days. I am using x12 Parser, OOPsfactory for parsing a x12n 834 file. I need to parse each and every member eligibility information from this file. However, I was able to convert them to xml file. I used every steps as described in Convert XML TO CSV OOPsFactory!

My code for transforming the file is:

    Stream _EligFileStream = new FileStream("E:\\Test\\a.dat", FileMode.Open, FileAccess.Read);
    EligibilityTransformationService _EligibilityTransformationService = new EligibilityTransformationService();
    EligibilityBenefitDocument _EligibilityBenefitDocument = _EligibilityTransformationService.Transform271ToBenefitResponse(_EligFileStream);
    List<EligibilityBenefitResponse> _EligibilityBenefitResponsesList = new List<EligibilityBenefitResponse>();
    _EligibilityBenefitResponsesList = _EligibilityBenefitDocument.EligibilityBenefitResponses;
    foreach (EligibilityBenefitResponse _EligibilityBenefitInquiry in _EligibilityBenefitResponsesList)
    {
        Console.WriteLine(_EligibilityBenefitInquiry.Dependent.Name);
        /*
        ....
        ....
        other required fields
        */
    }
    Console.Read();

The transformationcode of OopsFactory is returning me zero results. What am I doing wrong.

Does anyone has face the same problem before or had succeeded in parsing the 834 eligibility file using OopsFactory with any other free tool.