php and mySQL

Hi, I'm trying to update a mySQL database, with the following mixture of PHP and SQL. Unfortunately it does not work. Could anyone please point me in the correct direction. function update_all_trips( $db, $userfile, $userfile_name, $userfile_size, $userfile_type ) { mysql_query("Delete from all_trips"); $sql_upload_all_trips ="LOAD DATA INFILE '$userfile' INTO TABLE all_trips FIELDS TERMINATED BY ',' ENCLOSED BY \"'\""; $res_upload_all_trips = mysql_query($sql_upload_all_trips) or die("Cant insert Sam"); $successful = mysql_affected_rows($db); print "<br>Hi sam, you have uploaded <b>$successful</b> records"; }//end function update_all_trips function called by... update_all_trips( $db, $userfile, $userfile_name, $userfile_size, $userfile_type ); Thanks in advance Sam Rose