Check your database_tables.php file in includes in admin directory
Do you have these line in it ??
// BOF Linkmatics attributes sets plus custom tables
define('TABLE_PRODUCTS_ATTRIBUTES_SETS', 'products_attributes_sets');
define('TABLE_PRODUCTS_ATTRIBUTES_SETS_ELEMENTS','products_attributes_sets_elements');
define('TABLE_PRODUCTS_ATTRIBUTES_SETS_TO_PRODUCTS', 'products_attributes_sets_to_products');
// EOF Linkmatics attributes sets plus custom tables