PHP fatal error

hello i have this error on my error_log:

[17-Mar-2009 11:18:01] PHP Fatal error: Cannot redeclare userip() (previously declared in /home/xxxxx/public_html/xxxxx/manager/includes/document.parser.class.inc.php(769) : eval()’d code:176) in /home/xxxxxx/public_html/xxxxxx/manager/includes/document.parser.class.inc.php(769) : eval()’d code on line 195

and my site is down what is this? and what need i make to up site?

sorry for spam... answer is:
http://modxcms.com/forums/index.php/topic,5456.0.html