来高手啊，关于word合并的问题

  protected void Page_Load(object sender, EventArgs e)
    {
        if (!string.IsNullOrEmpty(Request["ReportID"]))
        {   
            string NewfileName = Server.MapPath("/Admin/WordPrint/Templet/合并附件.doc");
            
            VIVE.CNUOutlay.BLL.FileInfo file = new VIVE.CNUOutlay.BLL.FileInfo(); 
            string  fileName=string.Empty;
            DataSet ds = file.GetAllDynamic("ReportID='" + Request["ReportID"] + "'", "");
            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                fileName+=ds.Tables[0].Rows[i]["FilePath"].ToString()+',';
                
            }
            string [] getFileNames=fileName.Split(',');
            string path2 = UIHelper.GetReportFileUrl(Convert.ToInt32(Request["ReportID"]));
             InsertMerge(NewfileName, getFileNames, path2);
                
            UIHelper.DownLoadFile(path2);
                   
          
        }
    } /// <summary>
    /// 循环合并多个文件（插入合并文件）
    /// </summary>
    /// <param name="tempDoc">模板文件</param>
    /// <param name="arrCopies">需要合并的文件</param>
    /// <param name="outDoc">合并后的输出文件</param>
    public void InsertMerge(string tempDoc, string[] arrCopies, string outDoc)
    {
        ApplicationClass objApp = new ApplicationClass();
        object objMissing = Missing.Value;
        object objFalse = false;
        object confirmConversion = false;
        object link = false;
        object objTempDoc = tempDoc;
        object attachment = false;
    
        try
        {
            
            objApp.Documents.Open(
                 ref objTempDoc,    //FileName
                 ref objMissing,   //ConfirmVersions
                 ref objMissing,   //ReadOnly
                 ref objMissing,   //AddToRecentFiles
                 ref objMissing,   //PasswordDocument
                 ref objMissing,   //PasswordTemplate
                 ref objMissing,   //Revert
                 ref objMissing,   //WritePasswordDocument
                 ref objMissing,   //WritePasswordTemplate
                 ref objMissing,   //Format
                 ref objMissing,   //Enconding
                 ref objMissing,   //Visible
                 ref objMissing,   //OpenAndRepair
                 ref objMissing,   //DocumentDirection
                 ref objMissing,   //NoEncodingDialog
                 ref objMissing    //XMLTransform
                 );
           
            foreach (string strCopy in arrCopies)
            {
                if (!string.IsNullOrEmpty(strCopy))
                {
                    if (File.Exists(strCopy))
                    {
                        objApp.Selection.InsertFile(
                        strCopy,
                        ref objMissing,
                        ref objMissing,
                        ref objMissing,
                        ref objMissing
                        );
                    }
                }            }            object objOutDoc = outDoc;
            Word._Document objDocLast = objApp.ActiveDocument;
            objDocLast.SaveAs(
                ref objOutDoc,      //FileName  
                ref objMissing,     //FileFormat 
                ref objMissing,     //LockComments 
                ref objMissing,     //PassWord   
                ref objMissing,     //AddToRecentFiles
                ref objMissing,     //WritePassword   
                ref objMissing,     //ReadOnlyRecommended 
                ref objMissing,     //EmbedTrueTypeFonts  
                ref objMissing,     //SaveNativePictureFormat 
                ref objMissing,     //SaveFormsData      
                ref objMissing,     //SaveAsAOCELetter,    
                ref objMissing,     //Encoding     
                ref objMissing,     //InsertLineBreaks     
                ref objMissing,     //AllowSubstitutions    
                ref objMissing,     //LineEnding          
                ref objMissing      //AddBiDiMarks     
                );
            //保存到输出文件
            //SaveAs(outDoc);
            foreach (Document objDocument in objApp.Documents)
            {
                objDocument.Close(
                  ref objFalse,     //SaveChanges
                  ref objMissing,   //OriginalFormat
                  ref objMissing    //RouteDocument
                  );
            }
        }
        finally
        {
            objApp.Quit(
              ref objMissing,     //SaveChanges
              ref objMissing,     //OriginalFormat
              ref objMissing      //RoutDocument
              );
            objApp = null;
        }
    }
   
在SaveAs 的时候抛异常，看不懂什么意思，有那个知道的帮帮忙异常信息：
“/”应用程序中的服务器错误。
--------------------------------------------------------------------------------HINESENUM1C (195_441_2011_0.doc) 
说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。 异常详细信息: System.Runtime.InteropServices.COMException: HINESENUM1C (195_441_2011_0.doc)源错误: 
行 104:            object objOutDoc = outDoc;
行 105:            Word._Document objDocLast = objApp.ActiveDocument;
行 106:            objDocLast.SaveAs(
行 107:                ref objOutDoc,      //FileName  
行 108:                ref objMissing,     //FileFormat 
 源文件: e:\WorkPlace\首都师范大学\CNUOutlay\Code\Web\Admin\WordPrint\Print_Attachment.aspx.cs    行: 106 堆栈跟踪: 
[COMException (0x800a13e8): HINESENUM1C
 (195_441_2011_0.doc)]
   Microsoft.Office.Interop.Word.DocumentClass.SaveAs(Object& FileName, Object& FileFormat, Object& LockComments, Object& Password, Object& AddToRecentFiles, Object& WritePassword, Object& ReadOnlyRecommended, Object& EmbedTrueTypeFonts, Object& SaveNativePictureFormat, Object& SaveFormsData, Object& SaveAsAOCELetter, Object& Encoding, Object& InsertLineBreaks, Object& AllowSubstitutions, Object& LineEnding, Object& AddBiDiMarks) +0
   Admin_WordPrint_Print_Attachment.InsertMerge(String tempDoc, String[] arrCopies, String outDoc) in e:\WorkPlace\首都师范大学\CNUOutlay\Code\Web\Admin\WordPrint\Print_Attachment.aspx.cs:106
   Admin_WordPrint_Print_Attachment.Page_Load(Object sender, EventArgs e) in e:\WorkPlace\首都师范大学\CNUOutlay\Code\Web\Admin\WordPrint\Print_Attachment.aspx.cs:39
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +15
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +34
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +47
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061 
--------------------------------------------------------------------------------
版本信息: Microsoft .NET Framework 版本:2.0.50727.42; ASP.NET 版本:2.0.50727.42