Nivo Slider and custom fields

Hello,
I am trying to make nivo slider to work with Page custom field.I did manage to make it work with Post custom field, but when I use custom field from pages nothing happens.
Here is the code I am using:

<?php
		$postcount = 0;
        $featured_query = new WP_Query('showposts=1000');
        while ($featured_query->have_posts()) : $featured_query->the_post();

        $do_not_duplicate[] = get_the_ID();
        $postcount++;
        ?>	

        <?php
        // get the image filename
        $value_feat_img = get_post_custom_values("Image");

        if (isset($value_feat_img[0])) { ?>

        <a href="<?php the_permalink() ?>" rel="bookmark"><img src="<?php $values = get_post_custom_values("Image"); echo $values[0]; ?>" title="<?php the_title(); ?>" alt="<?php the_title(); ?>" />
        </a>

        <?php } ?>

		<?php endwhile; ?>

Do I need to modify something so the custom field from pages work ?
I am new to PHP so it’s hard for me to make it work.