AutoIt - Oracle - TNS Auflösung schlägt fehl?

#include <GUIConstants.au3>


Dim $oMyError


; Initializes COM handler
$oMyError = ObjEvent("AutoIt.Error","MyErrFunc")


$ado = ObjCreate( "ADODB.Connection" )    ; Create a COM ADODB Object  with the Beta version


With $ado
    ; 'Set data source - for OLEDB this is a tns alias, for ODBC it can be 'either a tns alias or a DSN.
    ; If "provider" is used this means that the ODBC connections is used via DSN. 
    ; if Driver is used = "Driver={Microsoft ODBC for Oracle};Server=TNSnames_ora;Uid=demo;Pwd=demo;" then this is a DSN Less connector
    ; More Info for Oracle MS KB Q193332
    .ConnectionString =("Provider='OraOLEDB.Oracle';Data Source='TNS NAME HERE';User Id='XXXX';Password='XXXXX';") 
    .Open
EndWith


$adors = ObjCreate( "ADODB.RecordSet" )    ; Create a Record Set to handles SQL Records


With $adors
        .ActiveConnection = $ado
        ;.CursorLocation = "adUseClient"
        ;.LockType = "adLockReadOnly" ; Set ODBC connection read only
        .Source = "select * from TABLE NAME HERE"
        .Open 
EndWith


While not $adors.EOF
    For $i = 0 To $adors.Fields.Count - 1
        ConsoleWrite( $adors.Fields( $i ).Value & @TAB )    ; Columns in the AutoIt console use Column Name or Index
    Next
        ConsoleWrite(@CR)
    $adors.MoveNext                                                ; Go to the next record
WEnd


; This COM error Handler
Func MyErrFunc()
  $HexNumber=hex($oMyError.number,8)
  Msgbox(0,"AutoItCOM Test","We intercepted a COM Error !"       & @CRLF  & @CRLF & _
             "err.description is: "    & @TAB & $oMyError.description    & @CRLF & _
             "err.windescription:"     & @TAB & $oMyError.windescription & @CRLF & _
             "err.number is: "         & @TAB & $HexNumber              & @CRLF & _
             "err.lastdllerror is: "   & @TAB & $oMyError.lastdllerror   & @CRLF & _
             "err.scriptline is: "     & @TAB & $oMyError.scriptline     & @CRLF & _
             "err.source is: "         & @TAB & $oMyError.source         & @CRLF & _
             "err.helpfile is: "       & @TAB & $oMyError.helpfile       & @CRLF & _
             "err.helpcontext is: "    & @TAB & $oMyError.helpcontext _
            )
  SetError(1)  ; to check for after this function returns
Endfunc