after clicking the activity on the gradebook, when trying to see just one group in the activity page, it stays the same and a browser error appears:
.NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
Fecha: Fri, 21 Jan 2011 17:45:05 UTC
Mensaje: Object doesn't support this property or method
Línea: 74
Carácter: 2
Código: 0
URI: http://148.228.217.100/moodle/theme/yui_combo.php?3.2.0/build/yui/yui-base-min.js&3.2.0/build/oop/oop-min.js&3.2.0/build/dom/dom-min.js&3.2.0/build/yui/yui-later-min.js&3.2.0/build/event-custom/event-custom-base-min.js&3.2.0/build/event/event-base-min.js&3.2.0/build/pluginhost/pluginhost-min.js&3.2.0/build/event/event-delegate-min.js&3.2.0/build/node/node-min.js&3.2.0/build/yui/get-min.js&3.2.0/build/loader/loader-min.js