Facebook like problem

I have big error. I use floating bar with facebook Like (XFBML). When ppl just like the post – its okay, but when they also sharing the post its not working. They just press share its loading but not posting on they wall… Idk why, mby coz i have w3 total cache plugin or smth else?

http://ww.wp.xz.cn/extend/plugins/digg-digg/