I have successfully upgraded the forum to version 5.0, and Everything was working fine. But all of a sudden I have lost the all the styles of forum –http://problem-with-post-edit-buttonaryanainfo.in/forum

I am not sure if there is some option disables or there is some functionality issue. I am trying to find out the option which is associated with forum style, but in vain. Please give me any suggestion that can make my forum working. 

Thank you