VBA и Oracle: stored procedure из VBA и сохранение текста в переменной

'-----------------------
Sub Extract_Data()
 
Dim cn As ADODB.Connection
Dim rs As ADODB.Recordset
Dim db_name, UserName, Password As String
 
cn.Open db_name, USerName, Password
 
sql_statement = "SELECT some_text FROM some_table"
 
Set rs = cn.Execute(sql_statement)
rs.MoveFirst 'jump to the first entry in the data list
 
Row = 2
While Not rs.EOF
'save the data to a worksheet
ip.Cells(Row, 2) = rs(0).Value
Row = Row + 1
rs.MoveNext
Wend
End Sub
'-----------------------

'----------------------
Public Sub obj_class()
 
Dim cn As New ADODB.Connection
Dim strSQL, cn As String
Dim adoCMD As ADODB.Command
Dim adoRS As ADODB.Recordset
 
Set wb = Excel.ActiveWorkbook
Set ih = wb.Sheets("InfoSheet")
 
cn.Open db_name, UserName, Password
 
Set adoCMD = New ADODB.Command
With adoCMD
.ActiveConnection = cn
.CommandText = "S#mdb$stg_da_extr_util.get_all_classes_of_classif"
.CommandType = adCmdStoredProc
.Parameters.Refresh
.Parameters("i_caller").Value = "'STG_DATA_REQUEST'" 'ошибка появляется здесь
.Parameters("i_obj_classif_id").Value = 120
 
Set adoRS = .Execute()
End With
End Sub
'----------------------