supesite7.5怎么不能安装了呀

supesite7.5怎么不能安装了呀.安装了ucenter后，再安装supesite7.5，就出现Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, webmaster@shuaiboy.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

More information about this error may be available in the server error log.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

该服务器遇到内部错误或配置错误，无法完成您的请求。

请与服务器管理员，webmaster@shuaiboy.com并通知他们的时间发生错误，和任何你可能这样做可能造成的错误。

更多有关此错误信息，可在服务器错误日志。

此外，1 404未找到错误时遇到试图使用的ErrorDocument来处理请求。