Broken Images

Hi
I have installed the plugin on a test site and it works beautifully. I then installed in on my live site http://www.instantonit.com/ and when I tried to upload image I simply get the broken image link icon and no image. The images are fine in the media library they just won’t go to the rotator plugin. I’ve disabled all other plugins and still no luck?
Any ideas please?

Regards
Helen

http://ww.wp.xz.cn/extend/plugins/weptile-image-slider-widget/