向数据库写入数据提示操作符丢失?该如何解决

向数据库写入数据提示操作符丢失?
相关代码如下:

Private   Sub   Form_Activate()

Set   conn   =   New   ADODB.Connection
conn.ConnectionString   =   "Provider=Microsoft.Jet.OLEDB.4.0;Data   Source= "   &   App.Path   &   "\data.mdb "
conn.Open

Set   rs   =   New   ADODB.Recordset
rs.CursorLocation   =   adUseClient
rs.Open   "course ",   conn,   1,   1

Set   rsCourse   =   New   ADODB.Recordset                                   '设置链接授课信息
rsCourse.CursorLocation   =   adUseClient
rsCourse.Open   "course ",   conn,   2,   2
Set   DataGrid1.DataSource   =   rsCourse
DataGrid1.Refresh
Set   DataGrid2.DataSource   =   rsCourse
DataGrid2.Refresh

Set   rsteachers   =   New   ADODB.Recordset           '连接教师信息
  rsteachers.CursorLocation   =   adUseClient
  rsteachers.Open   "teachers ",   conn,   2,   2
Set   txtName.RowSource   =   rsteachers
  txtName.ListField   =   "姓名 "
 
Set   rsKC   =   New   ADODB.Recordset                       '连接课程
  rsKC.CursorLocation   =   adUseClient
  rsKC.Open   "xsKC ",   conn,   1,   1
Set   txtKC.RowSource   =   rsKC
  txtKC.ListField   =   "课程名称 "
 
Set   rsZY   =   New   ADODB.Recordset                                 '设置链接的专业
  rsZY.CursorLocation   =   adUseClient
  rsZY.Open   "xsZY ",   conn,   1,   1
Set   txtZY.RowSource   =   rsZY
  txtZY.ListField   =   "专业名称 "
Set   txtzhuanye.RowSource   =   rsZY
  txtzhuanye.ListField   =   "专业名称 "

Set   TextJSXM.DataSource   =   rsCourse                         '绑定字段
Set   TextSSZY.DataSource   =   rsCourse
Set   TextKCM.DataSource   =   rsCourse
TextJSXM.DataField   =   "教师姓名 "
TextSSZY.DataField   =   "所属专业 "
TextJSXM.DataField   =   "课程名称 "

End   Sub
---------------------------
Sub   inputcourse_info()                 '添加授课信息到库
        Dim   txtSQL   As   String
        txtSQL   =   "select   *   from   course   where   教师姓名＝ ' "   &   Trim(txtName.Text)   &   " ' "
        Set   rs   =   New   ADODB.Recordset
        rs.CursorLocation   =   adUseClient
        rs.Open   txtSQL,   conn,   1,   1
        If   rs.EOF   =   False   Then
                MsgBox   "数据库已经存在教师姓名为： "   &   txtName.Text   &   "的教师授课信息，请重新输入！ ",   vbOKOnly,   "警告 "

                txtName.Text   =   " "
                txtKC.Text   =   " "
                txtZY.Text   =   " "
        Else
                rsCourse.AddNew
                rsCourse.Fields(0)   =   txtName.Text
                rsCourse.Fields(1)   =   txtKC.Text
                rsCourse.Fields(2)   =   txtZY.Text
        End   If
        rsCourse.Update
        DataGrid1.Refresh
        DataGrid2.Refresh
        MsgBox   "教师授课信息已经添加成功！ ",   vbOKOnly   +   vbInformation,   "提示 "
        txtName.Text   =   " "
        txtKC.Text   =   " "
        txtZY.Text   =   " "
End   Sub
-------------------------
不知道那里的错误

[解决办法]
Else
rsCourse.AddNew '---这个没定义，rsCourse定义在Form_Activate()，你在窗体最开始加上Option Explicit
rsCourse.Fields(0) = txtName.Text
rsCourse.Fields(1) = txtKC.Text
rsCourse.Fields(2) = txtZY.Text
End If
rsCourse.Update
DataGrid1.Refresh
DataGrid2.Refresh