Some OS have a blank page when login

[freed1985]

Server System is CentOS 5.4.
The version of ispCP is 1.0.4

When I login the panel with IE8 and Opera on Windows7,there was no problem.
But today somebody tell me when they login panel on windows xp.They get a blank page.
I also tried to login the panel on a computer with windows xp and IE8,there is a blank page,too.

I see my default-error.log,there is a notice:

Code:

[Fri Mar 26 08:42:21 2010] [notice] mod_fcgid: call /var/www/ispcp/gui/index.php with wrapper /var/www/fcgi/master/php5-fcgi-starter