Looking at the dynamically generated XML file for your gallery, the XML declaration is not at the very top of the document (where it should be). Line 1 of the file is blank.
Try viewing the file in a browser to see the error message: http://www.vancouverdesi.com/wp-content … llery_id=1
The file is created with the PHP function saveXML() so there should be no blank line before the XML declaration.
Please check that your web server runs PHP v5.2.0 or later.

I do not know why there is a blank line before the XML declaration in your gallery's XML files but I think that this is the root of the problem.
Try editing the 'wp-juicebox/config.php' file in a plain text editor and change line 148 from:

echo $new_dom_doc->saveXML();

... to:

echo $new_dom_doc->saveHTML();

This will save the file without an XML declaration which is not an ideal solution but should allow your galleries to function.

Please note that the line number above refers to WP-Juicebox v1.2.0.1.

Here are a few other suggestions to try.
(Unfortunately, I am unable to replicate the problem that you are currently experiencing so I cannot try the following suggestions myself to know whether or not theyu will help in your scenario.)

(1) Try changing line 148 of the 'wp-juicebox/config.php' file to the following:

echo $new_dom_doc->saveXML($new_settings_tag);

(2) Try adding the following on line 147 of the 'wp-juicebox/config.php' file:

ob_clean();

(3) Try removing line 3 of the 'wp-juicebox/config.php' file:

header('Content-type: application/xml');

If any of the above work, please post back to let me know.
Thank you.