网站搬到新空间，打开首页状态是500。

我的网站搬到新的空间上。打开首页是
Server Error
500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.
然后我从新安装ucenter跟uchome，全部安装后之后，打开首页出现的还是
Server Error
500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.

请问这是怎么会事？