[求助]4F的出现问题！

我的论坛安装好了，但在进入首页时出现了问题
问题如下：

1. Warning: main(DISCUZ_ROOT./include/forum.func.php): failed to open stream: No such file or directory in /home/free/xychina/index.php on line 16
   
2. 
   
3. Fatal error: main(): Failed opening required 'DISCUZ_ROOT./include/forum.func.php' (include_path='.:/usr/lib/php') in /home/free/xychina/index.php on line 16

复制代码

我想问一下这是怎么回事？