automatically adding mods to admin drop down menus

The mod I am trying to upgrade for 1.5 has an install button on the page. So I want to add a file and I thought extra configures would be the correct place but the exception says: Cannot execute because table " does not exist. CHECK PREFIXES! The file that runs the query to add to the configuration menu used the same table naming and it works. So what have I missed?

<?  
	
 if(!defined('CROSS_SELL_ENABLED') ) {
	 global $db;
	$db->Execute("INSERT INTO " . TABLE_ADMIN_PAGES ." (`page_key`, `language_key`, `main_page`, `page_params`, `menu_key`, `display_on_menu`, `sort_order`) VALUES ('catalogUltimateCrossSell', 'BOX_CATALOG_MULTI_CROSS_SELL_PRODUCTS', 'FILENAME_CROSS_SELL_PRODUCTS', '', 'catalog', 'Y', '100')");
}
else {
}
	 
 ?>

TABLE_ADMIN_PAGES probably hasn't been defined at this point of the process.
Try putting your code here instead: ...
YOUR_RENAMED_ADMIN\includes\functions\extra_functions