qTranslate bug: add a different featured image for each language

I am using the qTranslate plugin on cocorico.ro. I need to add a different post/page featured image for 2 diffrent languages

In the functions.php file I have:

if (class_exists('MultiPostThumbnails')) {
	new MultiPostThumbnails(array(
		'label' => 'English featured image',
		'id' => 'english-featured-image',
		'post_type' => 'page'
	 ));
 }

In the template:

<?php  
	if ( qtrans_getLanguage() == 'ro' ) { ?>
		<a href="<?php the_permalink(); ?>" class="thumbnail"><?php the_post_thumbnail(); ?></a>
	<?php  }
	elseif ( qtrans_getLanguage() == 'en' ) { ?>
		<a href="<?php the_permalink(); ?>" class="thumbnail">
			<?php if (class_exists('MultiPostThumbnails')) {
				MultiPostThumbnails::the_post_thumbnail(get_post_type(), 'english-featured-image');
			} ?>
		</a> 
<?php } ?>

But the result of the code above is strangely a blank page from the navigation downwards? Why?