Plugins not functioning on main page

I’ve strange problem with plug-ins not working on the main index-page.

I’ve a website which structure is that it has 5 different pages underneath each other on index-page. So there the whole website contains only one main page with different sections (in this case pages).

I’ve brought the pages with this:

<?php $page_ids = array(‘gallery’ => 60); $page_gallery = get_page($page_ids[‘gallery’]); echo “<h2></h2>”; echo $page_gallery->post_content; ?>

Everything else is functioning but the plug ins don’t work on the main page. Tried to add nextGen gallery but on the front page it reads:

[nggallery id=test]

but when i view the page separately the gallery & plugin just works fine.
would appreciate the help in here!

EDIT: had similiar problem with different plugins as well.