Postgresql Large Objhect

Hi All, I can't seem to get my PHP script to read in a postgres large object. I know the object exists as I can do a select lo_export(image, <filename) from images; and it works. The code I've got is as follows. The result I get is 'ERROR: lo_lseek: invalid large obj descriptor (0)'. Thanks, Shaun $qImage = "select image from images where auction_id = " . $auction_id; $rImage = pg_exec($qImage); if (!$rImage) exit; if (pg_numRows($rImage) != 1) exit; // Try to open the large object $res = pg_fetch_array($rImage, 0); print $res['image'] . "<BR>I am here!<BR>"; if (!($resId = pg_loopen($db, $res['image'], "rw"))) { print pg_errormessage($db); exit; } // Give them the appropriate mime headers header("Content-Type: image/jpeg"); // Rip the data out of the large object interface pg_loreadall($resId); pg_loclose($resId);