gistfile1.txt

I cannot seem to get this to work... I'm on Genesis 1.9.2

My CPT Projects has several metaboxes. I have four image/file upload metaboxes. I am using the following for the boxes:

array(
        'name' => 'Main Project Image',
    'desc' => 'Upload an image or enter an URL for the Main Image',
    'id' => $prefix . '_main_project_img',
    'type' => 'file',
    'save_id' => true, // save ID using true
   ),
On my page template, I am using the following:

global $post;

$mainimage = wp_get_attachment_image_src( get_post_meta( $post->ID, 'main_project_img_id', true ), 'projects' ); 
// Where projects is a custom image size
Whithin the page, I have the following HTML:

    <div class="project-featured-img"><img src="<?php echo $mainimage[0] ?>" alt="<?php echo $cattitle ?>" /></div>
But this will not work for me. I do not get any information displayed. The page template is outputting the following:

    <div class="project-featured-img"><img src alt="Category Title" /></div>