Custompress: Website links not working

Hi there
I have some Custom Fields that are complete web addresses (including http://) and when I use the Wordpress link button to link an image to that Custom Field (ie the web address), the result is that it doesn't pull the data from that Custom Field.

I have tried both [ct id="_ct_text_56f9dbf7ebd91" property="value"] and <?php echo do_shortcode('[ct id="_ct_text_56f9dbf7ebd91" property="value"]'); ?> but neither works.

Are you able to offer any advice?
Thanks