try adding ‘&paged=’.$paged to your query string
<?php $mainList_query = new WP_Query('cat=4,352,731,754,49,44,54,17&showposts=200&order=DESC&paged='.$paged); ?>
try adding ‘&paged=’.$paged to your query string
<?php $mainList_query = new WP_Query('cat=4,352,731,754,49,44,54,17&showposts=200&order=DESC&paged='.$paged); ?>