Installing and upgrading help

I tried to rate in a forum an got

http://www.aestudiar.cl/curso/mod/forum/rate.php

Warning: Undefined variable: CFG in /usr/local/httpd/htdocs/www/www.aestudiar.cl/curso/lib/weblib.php on line 199


' + inobj[objprop] + '\n');
}
op.document.close();
}

function fillmessagebox(text) {
document.form.message.value = text;
}

function openpopup(url,name,height,width) {
fullurl = "http://www.aestudiar.cl/curso" + url;
options = "menubar=0,location=0,scrollbars,resizable,width="+width+",height="+height;
windowobj = window.open(fullurl,name, options);
windowobj.focus();
}

function copyrichtext(textname) {
textname.value = document.richedit.docHtml;
return true;
}


// done hiding -->

Continuar

I tried to correct this problem puting

global $CFG 

on line 191 and was very worse.

Please give me some help