Hi,
Your website includes jQuery conflict issue, this is why our module's preloader function doesn't work.
If you look at the source codes, you would notice, your website loads 2 different jQuery library. (one comes with Virtuemart, other comes with one swMenuFree extension.
Please see the screenshot, this additional jQuery1.6 was the reason of JAVA conflict. Please disable that, and our Module will start working okay.
Forum Support.