Why is the region in Drupal blank?
as your question doesn't have any proper explanation, people most likely cant help you. but I can guess that what you are doing wrong is that you make a region--footer.tpL.php file (you missed the L in the end), you also need to render it on the page you want it there to be, so practically it wont show you anything since its not rendering at all.

my suggestion is forget about region--footer.tpl.php and add 

&lt;?php
    print render($page['footermenu']);
?&gt;


right into your page.tpl.php or any other theme hooks you might want it there.

by the way a very rookie mistake is that you already done everything right but after editing your .info file you forgot to clear the cache in admin/config/settings/development/performance