LDAP连接操作系统之间的区别

Question

我有在两个不同系统上执行LDAP查询的相同方法。方法很简单：

Public Function AutenticaDominio(ByVal user As String, ByVal ambiente As String) As String


    Dim Comm As New ADODB.Command
    Dim conn As New ADODB.connection

    Dim rs As New ADODB.Recordset
    Dim codiceBanca As String

    Dim currentAmbiente As String
    Dim currentName As String
    Dim trovato As Boolean
    Dim UserName As String

    Set conn = CreateObject("ADODB.Connection")
    conn.Provider = "ADsDSOObject"
    conn.Properties("User ID") = "XXX"
    conn.Properties("Password") = "XXX"
    conn.Open "DS Query", "XXX", "XXX"
    Set Comm = CreateObject("ADODB.Command")
    Set Comm.ActiveConnection = conn
    Comm.CommandText = "SELECT SBAcodicebanca FROM 'LDAP://abc.cde.fgh.it/ou=bank,dc=cde,dc=it' WHERE uid = '" & user & "' and SBAelencoambienti = 'sbacodicesottoambiente=GEST,sbacodiceambiente=PROT,ou=applicazioni,dc=cde,dc=it'"
    rs.CursorLocation = adUseClient
    Set rs = Comm.Execute

    If rs.EOF = False Then
       If rs.Fields.Item(0) = "099" Then
          Autentica = rs.Fields.Item(0)
          Exit Function
       Else
               Autentica = ""
       End If
    Else
        Autentica = ""
    End If

End Function

rs.execute语句，返回一个“未指定的错误”，我在Windows XP上运行该方法。该方法适用于Windows 7。

项目是相同的，具有相同的参考和组件。

有谁知道错误在哪里？