Using is_page() function for Page with custom WP_Query

I’m having a few problems with a WordPress page which uses a custom WP_Query. Here’s an example of the page.

Essentially the problem is when I try to detect the page in my code using the is_page it fails. is_page() is used for highlighting the current page in the site’s navigation menu, it appears to fail when I try and test for the page name is_page(‘image-archive’) which is the page the template is attached to. Is this in any way due to the the manner in which I have used WP_Query?

To put into context the image archive page utilises the Yet Another Photoblog plugin and displays a thumbnail for every post created on the blog. Is the page correct or should I be displaying the information in another way.

Any help with this would be greatly appreciated.

Here is the navbar code called,

<!-- Fixed navbar -->
<div class="navbar navbar-fixed-top navbar-inverse">
	<div class="navbar-inner">
	  <div class="container">
		<a id="navbar-btn" class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
		  <span class="icon-bar"></span>
		  <span class="icon-bar"></span>
		  <span class="icon-bar"></span>
		</a>

		<?php if(is_home()): ?>
		 <div id="navbar-branding"><a id="logo" class="brand pull-left" href="<?php bloginfo('url' ); ?>">
			<?php echo bloginfo('name' ); ?>:</a></div>
			<?php the_title('<h1 class="pull-left" id="header-title">','</h1>'); ?>
		<?php elseif(is_single() || is_page('about-me') ||  is_page('image-archive') || is_page('contact-me')): ?>
			<div id="navbar-branding"><a id="logo" class="brand pull-left" href="<?php bloginfo('url' ); ?>"><?php echo bloginfo('name' ); ?>:</a></div>
			<?php the_title('<h1 class="pull-left" id="header-title">','</h1>'); ?>
		<?php elseif(is_tag()): ?>
			<div id="navbar-branding"><a id="logo" class="brand pull-left" href="<?php bloginfo('url' ); ?>"><?php echo bloginfo('name' ); ?>:</a></div>
			<h1 class="pull-left" id="header-title">Tag</h1>
		<?php elseif(is_category()): ?>
			<div id="navbar-branding"><a id="logo" class="brand pull-left" href="<?php bloginfo('url' ); ?>"><?php echo bloginfo('name' ); ?>:</a></div>
			<h1 class="pull-left" id="header-title">Category</h1>
		<?php elseif(is_search()): ?>
			<div id="navbar-branding"><a id="logo" class="brand pull-left" href="<?php bloginfo('url' ); ?>"><?php echo bloginfo('name' ); ?>:</a></div>
			<h1 class="pull-left" id="header-title">Search Results</h1>
		<?php elseif(is_404()): ?>
			<div id="navbar-branding"><a id="logo" class="brand pull-left" href="<?php bloginfo('url' ); ?>"><?php echo bloginfo('name' ); ?></a></div>
		<?php endif; ?>

		<div class="nav-collapse collapse">
		  <ul class="nav pull-right">
			<li id="mobile-home" <?php if ( is_home()) { echo ' class="active"'; } ?>><a href="<?php bloginfo('url' ); ?>">Home</a></li>
			<li <?php if ( is_page('about-me')) { echo ' class="active"'; } ?>><a href="<?php echo esc_url( get_permalink( get_page_by_title( 'about me' ) ) ); ?>">About</a></li>
			<li <?php if ( is_page('image-archive')) { echo ' class="active"'; } ?>><a href="<?php echo esc_url( get_permalink( get_page_by_title( 'image archive' ) ) ); ?>">Archive</a></li>
			<li <?php if ( is_page('contact-me')) { echo ' class="active"'; } ?>><a href="<?php echo esc_url( get_permalink( get_page_by_title( 'contact me' ) ) ); ?>">Contact</a></li>
			<li><a href="<?php echo get_a_random_post(); ?>">Random</a></li>
			<li><?php get_search_form(); ?></li>
		  </ul>
		</div><!--/.nav-collapse -->
	  </div>
	</div>
</div>

and the code for the image-archive template,

<?php
/*
	Template Name: Image-Archive
*/

$temp = $wp_query;
$wp_query= null;
$wp_query = new WP_Query();
$wp_query->query('showposts=10'.'&paged='.$paged);

get_header();
get_template_part('navbar');
?>
	<!-- Begin page content -->
	  <div class="container">
		<div class="row">
			<div class="span8">
				<div class="row">
						<div id="upper-pagination" class="pagination span7">
								<?php paginate(); ?> // Calls custom pagination function to paginate image thumbnails.
						</div>
				</div>
				<div class="row">
					<div class="span7">
						<ul class="thumbnails">
						<?php while ($wp_query->have_posts()) : $wp_query->the_post(); ?>

						<?php 

								// Let's define the needed thumbnail format

								$thumbConfig = array('w=100','h=100','zc=1');
							?>

								<?php if (!is_null($image = YapbImage::getInstanceFromDb($post->ID))): ?>
									<li>
										<div class="thumbnail">
											<a class="thumbnail" title="<?php the_title(); ?>" href="<?php echo get_permalink($post->ID); ?>">
												<img src="<?php echo $image->getThumbnailHref($thumbConfig) ?>" width="<?php echo $image->getThumbnailWidth($thumbConfig) ?>"
												height="<?php echo $image->getThumbnailHeight($thumbConfig) ?>" alt="<?php the_title(); ?>" />
											</a>		

										</div>
									</li>
								<?php endif ?>

						<?php endwhile; ?>

						</ul>

					</div>
				</div>
				<div class="row">
						<div class="pagination span7">
							<?php paginate(); ?> // Calls custom pagination function to paginate image thumbnails.
						</div>
				</div>
			</div>
			<div class="span4">
				<?php get_template_part('display_archive_sidebar'); ?>
			</div>
		</div>
	  </div>

	  <div id="push"></div>
	</div>
	<!-- End wrap -->
    <?php get_template_part('info_page_footer'); ?>
<?php
	$wp_query = null;
	$wp_query = $temp;
	get_footer();
?>