Hey guys, I've run into trouble with my site. Ive downloaded a PHP nuke theme, and tried getting it to work on zymic, but to no avail.
I get this Error:

Warning: require_once(mainfile.php) [function.require-once]: failed to open stream: No such file or directory in /www/vndv.com/f/d/g/fdgaming/htdocs/theme_install.php on line 3

Fatal error: require_once() [function.require]: Failed opening required 'mainfile.php' (include_path='.:/usr/share/php') in /www/vndv.com/f/d/g/fdgaming/htdocs/theme_install.php on line 3

Any suggestions?
Thanks
FDGAMING

Can you post the code for "theme_install.php"
Thank you
ps, use PasteSite

and I can add something maybe could help try to make this file at least 777 then after finish successfully return it to 555