Problems with submiting data

Hy guys.

I am having problems submiting user data through your plugin. The features only work in preview mode, but they don’t function when I post the shortcode in one of my portfolio’s. Here is the published post, which contains your form – http://www.tipteh.si/novice/prijava-na-obuku/. Is there any way to solve this problem?