用FAMP2.2B架设好WEB服务器后安装论坛出问题

基于FREEBSD6.2用FAMP2.2B架设好WEB服务器后安装phpwind论坛出问题，提示如下：
Warning: Unknown(/usr/home/wwwroot/install.php): failed to open stream: Permission denied in Unknown on line 0

Warning: Unknown(/usr/home/wwwroot/install.php): failed to open stream: Permission denied in Unknown on line 0

Warning: (null)() [function.include]: Failed opening '/usr/home/wwwroot/install.php' for inclusion (include_path='.:/usr/local/php/lib/php') in Unknown on line 0
浏览phpmyadmin，phpinfo()功能正常 能正常使用
求教，谢谢

看看文件的权限问题。