The problem was a wrong connection string.
I had oConnc.Open "DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=" & Server.MapPath("\imaginarte\database\lista.mdb")

Instead of....uConnection = "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=" & Server.MapPath("\imaginarte\database\lista.mdb") & ";" & _
"Persist Security Info=False"
oConn.Open(uConnection)

for OLE Objects.

Thanks.