hello,every body,i have a question but i don`t know where i should ask,so i place it, im sorry.

now,the problem is:i want to rewrite the meta tags of pages in ezpage,such as news,new products,specials .etc . but after i defind it in /include/languages/english/meta_tags.php,for example

//new products
define('META_TAG_DESCRIPTION_products_new',aaaaaaaaaaaa');
define('META_TAG_KEYWORDS_products_new',bbbbbbbbbbbbbbb');
define('META_TAG_TITLE_products_new', cccccccccccccccccccc');


or
//new products
('META_TAG_DESCRIPTION_EZPAGE_14',aaaaaaaaaaaa');
define('META_TAG_KEYWORDS_EZPAGE_14',bbbbbbbbbbbbbbb');
define('META_TAG_TITLE_EZPAGE_14', cccccccccccccccccccc');


all thest two methods do not show any effect, the meta tag still show the defind.
my god, what`s wrong? help me, my site here www.agoodseller.com