crystal report 8.5 export to csv and rtf format not working with office 2013

Hi Experts,

Crystal report version 8.5 hangs and eventually crash when i export my report to csv or rtf format on windows 7 with office 2013 installed, code is written in VB 6 although the same scenario is working with office 2010 installed.

i debugged the code and found the application hangs at function Report.Export(False).

below is the code snippet

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       .PDFExportAllPages = True 'ePDFExportAllPages
       .PDFFirstPageNumber = ePDFFirstPageNumber
       .PDFLastPageNumber = ePDFLastPageNumber
       .RTFExportAllPages = True 'eRTFExportAllPages
       .RTFFirstPageNumber = eRTFFirstPageNumber
       .RTFLastPageNumber = eRTFLastPageNumber
       .UseReportDateFormat = eUseReportDateFormat
       .UseReportNumberFormat = eUseReportNumberFormat
       .UseReportNumberFormat = eUseReportNumberFormat
       .XMLAllowMultipleFiles = eXMLAllowMultipleFiles
       .XMLFileName = eXMLFileName
   

       Report.Export (False) ----Application hangs here and eventually crash

*****************************************************************************

Looking forward for your help, as it is very urgent

Regards

Mohit