Show attached image (image type)

Excellent plugin! has helped me a lot …
I want to know if there is any alternative way to show the attached pictures, I tried this:

$files = rwmb_meta( 'info', 'type=file' );
foreach ( $files as $info )
{
    echo "<a href='{$info['url']}' title='{$info['title']}'>{$info['name']}</a><br />";
}

But it did not work.
I do not know if the problem is because of the version of wordpress (3.3.1) or the version of the plugin (4.1.8), or both!

Thank you.

https://ww.wp.xz.cn/plugins/meta-box/