As with others, the map will not open when clicked. I checked the code for JQuery duplicated scripts, but I don't see anything obvious, unless some libraries are similar but have different names.
I reverted to a default theme and the plugin works. With my current theme and no plugins activated, except the Google Maps Widget plugin, the plugin does not work, so it's theme related I think.
Can you have a quick look and see if you spot anything obvious? http://sirinameru.com/contact/