errore di sintassi

[xpress]

qualcuno riesce ad individuare un errore in questa stringa???

$option_values_query = tep_db_query("select pv.products_options_values_id, pv.products_options_values_name from ". TABLE_PRODUCTS_OPTIONS_VALUES . " pv, ". TABLE_PRODUCTS_OPTIONS ." po join " . TABLE_PRODUCTS_OPTIONS_VALUES_TO_PRODUCTS_OPTIONS . " popv on (pv.products_options_values_id = popv.products_options_values_id) where popv.products_options_id = po.products_options_id and popv.products_options_id =" . $attributes["products_options_id"] . " and po.language_id =". (int)$languages_id . " group by products_options_values_id, products_options_values_name");