AR9导出问题

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同样的程序发布在两台服务器上，一台正常，一台导出报如图错误。是缺少什么配置或者组件吗？两台服务器的系统配置一模一样。

这是导出的代码

protected void btnExcel_Click(object sender, EventArgs e)
{
GenerateReport();
System.IO.MemoryStream ms = new System.IO.MemoryStream();
// 导出Excel文件设置
GrapeCity.ActiveReports.Export.Excel.Page.ExcelRenderingExtensionSettings excelSetting = new GrapeCity.ActiveReports.Export.Excel.Page.ExcelRenderingExtensionSettings();
excelSetting.FileFormat = GrapeCity.ActiveReports.Export.Excel.Page.FileFormat.Xls;
excelSetting.OpenXmlStandard = GrapeCity.ActiveReports.Export.Excel.Page.OpenXmlStandard.Transitional;
excelSetting.Pagination = true;
excelSetting.MultiSheet = false;
GrapeCity.ActiveReports.Extensibility.Rendering.ISettings setting = excelSetting;
//设置渲染方式
GrapeCity.ActiveReports.Export.Excel.Page.ExcelRenderingExtension excelRenderingExtension = new GrapeCity.ActiveReports.Export.Excel.Page.ExcelRenderingExtension();
GrapeCity.ActiveReports.Rendering.IO.MemoryStreamProvider outputProvider = new GrapeCity.ActiveReports.Rendering.IO.MemoryStreamProvider();
report.Document.Render(excelRenderingExtension, outputProvider, excelSetting.GetSettings());
Response.ContentType = "application/vnd.ms-excel";
Response.AddHeader("content-disposition", "inline;filename=MyExport.xls");
outputProvider.GetPrimaryStream().OpenStream().CopyTo(ms);
Response.BinaryWrite(ms.ToArray());
Response.End();
}