不能进入UCHOME后台

使用DISCUZ7.2+UCENTER1.5+UCHOME2.0整合包作网站
安装完成后,其他都没有问题,刚刚完成时第一次能进入,之后就不能进入了!
http://www.fdsquare.com/uchome/admincp.php   (UCHOME后台网址)
会出现
Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator, webmaster@fdsquare.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.
Apache/2.2.15 (Unix) mod_ssl/2.2.15 OpenSSL/0.9.8e-fips-rhel5 mod_fcgid/2.3.5 Phusion_Passenger/2.2.11 mod_auth_passthrough/2.1 mod_bwlimited/1.4 FrontPage/5.0.2.2635 Server at www.fdsquare.com Port 80


后来上网查到是在CONFIG.PHP的UC_IP出了问题,只要把127.0.0.1改回网站的真实IP就没有问题,但是情况一样,
请各位帮我看看是那部份出了问题