please help with uploading!

[Anon]

                    i'm having problems uploading images into the posrgres database. the code i'm using is 

                    $sqlquery = "insert into binary_data1 values (nextval('value_sequence'), 
                    '$description', 
                    lo_import('$data'), 
                    '$input_file_name', 
                    '$input_file_size', 
                    '$input_file_type', 
                    '0');"; 


                    $res_id = pg_Exec ($sqlquery,$conn_id); 
                    echo " the value of res_id is $res_id"; 

                    $new_id = pg_getlastoid($res_id); 

                    the error i get is 

                    Warning: 0 is not a PostgresSQL link index in fileman.php3 on line 155 
                    the value of res_id is 
                    Warning: 0 is not a PostgresSQL result index in /fileman.php3 on line 158 

                    i would really appreciate it if someone could help me with this problem 

                    thanks in advance