Here's some code if it helps:

Code:
Dim connStringRPP As String = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
                               "data source=d:\test.mdb"
        Dim cnRPP As New OleDb.OleDbConnection(connStringRPP)
        Dim cmdTextRPP As String = "SELECT * FROM Bio ORDER BY fldLastName ASC"
        Dim cmdRPP As New OleDb.OleDbCommand(cmdTextRPP, cnRPP)
        Dim daRPP As New OleDb.OleDbDataAdapter(cmdRPP)
        Dim dsRPP As New DataSet()
        daRPP.FillSchema(dsRPP, SchemaType.Source, "Bio")
        daRPP.Fill(dsRPP, "Bio")

        lstUsers.DataSource = dsRPP
        lstUsers.DataBind()
lstUsers is the dropdownlist.