How Do I Fix This?

[on3simpleclick]

I just installed a new forum for a friend & have been having countless problems.
The one I have left is this.. the forum style won't show. Even the default one.. :(

https://vborg.vbsupport.ru/external/2013/06/9.jpg

Can someone please tell me how to fix this?.. cause I'm about ready to quit.. :confused:

[ForceHSS]

What are you using for forum url in admincp/settings/options/Site Name/URL/Contact Details/Forum URL