K2 BPM项目 基于COM组件调用SAP RFC 问题

问题前景：

　　环境：Win 2008 R2 64bit

　　最近项目中有支流程需求中需要在会计入账环节回写SAP的会计凭证。

　　SAP组给我们提供.NET基于COM组件调用SAP RFC的函数及参数，花费大量时间查阅资料终于知道怎么调用该函数：

SAPHelper.cs

private string CompanyCode { get; set; }
        private string ProofDate { get; set; }
        private string PostDate { get; set; }
        private string OutSub { get; set; }
        private string InSub { get; set; }
        private string Amount { get; set; }
        private string Currency { get; set; }
        private string Text { get; set; }
        private string UserAccount { get; set; }
        private bool Flag { get; set; }

        public bool MoneyTransfer(string CompanyCode, string ProofDate, string PostDate, string OutSub, string InSub, string Amount, string Currency, string Text, string UserAccount)
        {
            this.CompanyCode = CompanyCode;
            this.ProofDate = ProofDate;
            this.PostDate = PostDate;
            this.OutSub = OutSub;
            this.InSub = InSub;
            this.Amount = Amount;
            this.Currency = Currency;
            this.Text = Text;
            this.UserAccount = UserAccount;
            Thread s = new Thread(new ThreadStart(Transfer));
            s.SetApartmentState(System.Threading.ApartmentState.STA);//Set the run mode 'STA'
            s.Start();//Start the thread
            s.Join(); //Wait until thread run OK.
            return Flag;
        }
        /// <summary>
        /// 公司内部调拨凭证生成接口
        /// </summary>
        /// <param name="I_BUKRS">公司代码</param>
        /// <param name="I_BLDAT">凭证日期</param>
        /// <param name="I_BUDAT">过账日期</param>
        /// <param name="I_OSAKNR">转出科目</param>
        /// <param name="I_ISAKNR">转入科目</param>
        /// <param name="I_WRBTR">金额</param>
        /// <param name="I_WAERS">货币</param>
        /// <param name="I_SGTXT">项目文本</param>
        /// <param name="I_USERNAME">操作用户</param>
        private void Transfer()
        {
            Connection conn = GetConnection();
            try
            {
                //登陆
                if (conn.Logon(null, true))
                {
                    SAPFunctionsClass functions = new SAPFunctionsClass();
                    functions.Connection = conn;
                    //传入Function Name
                    Function fucntion = (Function)functions.Add("ZFI_FM005");
                    #region 传入值参数
                    Parameter pCompanyCode = (Parameter)fucntion.get_Exports("I_BUKRS");
                    pCompanyCode.Value = CompanyCode;
                    Parameter pProofDate = (Parameter)fucntion.get_Exports("I_BLDAT");
                    pProofDate.Value = ProofDate;
                    Parameter pPostDate = (Parameter)fucntion.get_Exports("I_BUDAT");
                    pPostDate.Value = PostDate;
                    Parameter pOutSub = (Parameter)fucntion.get_Exports("I_OSAKNR");
                    pOutSub.Value = OutSub;
                    Parameter pInSub = (Parameter)fucntion.get_Exports("I_ISAKNR");
                    pInSub.Value = InSub;
                    Parameter pAmount = (Parameter)fucntion.get_Exports("I_WRBTR");
                    pAmount.Value = Amount;
                    Parameter pCurrency = (Parameter)fucntion.get_Exports("I_WAERS");
                    pCurrency.Value = Currency;
                    Parameter pText = (Parameter)fucntion.get_Exports("I_SGTXT");
                    pText.Value = Text;
                    Parameter pUserAccount = (Parameter)fucntion.get_Exports("I_USERNAME");
                    pUserAccount.Value = UserAccount;
                    #endregion
                    //传出参数
                    Parameter OutPut = (Parameter)fucntion.get_Imports("I_RETURN");
                    //调用函数
                    if (fucntion.Call())
                    {
                        #region 
                        string s = OutPut.Value.ToString();
                        //to do 
                        if (s.Contains("错误"))
                        {
                            this.Flag = false;
                        }
                        else
                        {
                            this.Flag = true;
                        }
                        #endregion
                    }
                }
                //退出登陆
                conn.Logoff();
            }
            catch (COMException ex)
            {
                conn.Logoff();
                Flag= false;
            }
        }

        private Connection GetConnection()
        {
            SAPLogonControlClass connctl = new SAPLogonControlClass();

            connctl.Client = ConfigurationManager.AppSettings["SAPClient"];
            connctl.Language = "ZH";
            connctl.ApplicationServer = ConfigurationManager.AppSettings["ApplicationServer"];
            connctl.SystemNumber = 00;
            connctl.User = ConfigurationManager.AppSettings["SAPUser"];
            connctl.Password = ConfigurationManager.AppSettings["SAPPassword"];

            return (Connection)connctl.NewConnection();
        }

调用：

SAPService service = new SAPService();
                this.ContinueProcessFlag = service.MoneyTransfer(txtPayCompanySAPCode.Text.Trim(), txtTransferDate.Text.Trim(), txtTransferDate.Text.Trim(), txtPaySAPAccountCode.Text, txtInComeSAPAccountCode.Text, txtPayAmountLow.Text, "CNY", txtTransferReason.Text, WebContext.Current.CurrentEmployee.UserAccount);

编译完后调试，OK。

本地调试OK。

然而发布到IIS上后问题出现了:

发布后调用调试IIS（怎么调试略），发现在if (conn.Logon(null, true))停留，无法登录。

经过研究与查阅大量资料后，基本确定问题是在与IIS在调用组件的权限问题上。根据http://wenku.it168.com/d_001035865.shtml 配置DCOM权限将“启动与激活”和“访问权限”改为自定义并加上EveryOne权限，将标识改为“交互式用户”，IIS应用程序池使用的是隶属于管理员组的域帐号，托管管道模式使用的是集成模式：

然而问题依旧，尝试过将应用程序池域帐号，IUSR组，IIS_WPG组加到“访问权限”和“启动和激活权限”，未果。

期待各位大虾门指点思路。