[VB6] Errore DataCombo "Class does not support automation or expected interface"

[Gumble]

ho provato a popolare anche un datagrid cosi:

Private Sub cmdELang_Click()
    Dim eRcsLangs As ADODB.Recordset
    Dim qLangs As String
    
    qLangs = "SELECT * FROM lang"
    
    Set eRcsLangs = db.exeQuery(qLangs)
    
    Set dbgCommon.DataSource = eRcsLangs

End Sub

e mi da questo errore:

430 - Class does not support automation or expected interface

help.. non riesco ad andare oltre!