[SQL] Problem inserting image

[Tk421]

I've made a routine in VB to insert a image into a table. The code is:          Set cmd = New ADODB.Command             cmd.ActiveConnection = objconexion             cmd.CommandText = "INSERT INTO tb_tmp_ventanas (ventana) VALUES (?)"             archivo = "c:\image.jpg"             fd = FreeFile             Open archivo For Binary Access Read As fd             flen = LOF(fd)             Set imagen = cmd.CreateParameter("imagen", adLongVarBinary, adParamInput, flen)             ReDim chunk(1 To flen)             Get fd, , chunk()             imagen.AppendChunk chunk()             cmd.Parameters.Append imagen             Set rsInsert = cmd.Execute             Close            But on execute there is the next error: ERROR: type "lo" does not exist;     How can i reference the "lo" type or create it, in postgres 8.3     Thank you very much