Problema con guardar

[hulray]

$con_sql = "select * from am_inspeccion where ins_folio='$id_insmod'";
$ret = db_query($con_sql) or die(db_error());
$row = db_fetch_array($ret);

$f_folio = $row["ins_folio"];
$f_codest = $row["ins_estado"];
$f_solicitx = $row["ins_nomemp"];
$f_fec_dig = $row["ins_fecing"];
$fech_act1 = $row["ins_fecing1"];
$fech_act2 = $row["ins_fecing2"];
$fech_act22 = $row["ins_fecing22"];
$fech_act222 = $row["ins_fecing222"];


$f_fdig_aa = substr($f_fec_dig,0,4);
$f_fdig_mm = substr($f_fec_dig,4,2);
$f_fdig_dd = substr($f_fec_dig,6,2);

$f_fdig_aa1 = substr($fech_act1,0,4);
$f_fdig_mm1 = substr($fech_act1,4,2);
$f_fdig_dd1 = substr($fech_act1,6,2);

$f_ni_aa2 = substr($fech_act2,0,4);
$f_ni_mm2 = substr($fech_act2,4,2);
$f_ni_dd2 = substr($fech_act2,6,2);

$f_ni_aa22 = substr($fech_act22,0,4);
$f_ni_mm22 = substr($fech_act22,4,2);
$f_ni_dd22 = substr($fech_act22,6,2);

$f_ni_aa222 = substr($fech_act222,0,4);
$f_ni_mm222 = substr($fech_act222,4,2);
$f_ni_dd222 = substr($fech_act222,6,2);


$f_hora = $row["ins_hora"];
$f_hora1 = $row["ins_hora1"];
//$f_hora2 = $row["ins_hora2"];