Warning: simplexml_load_file() [function.simplexml-load-file]: I/O warning : failed to load external entity "config_xml//Topic.xml" in G:\Tomcat 6.0\webapps\DADH\Topic.php on line 48

Fatal error: Call to a member function children() on a non-object in G:\Tomcat 6.0\webapps\DADH\Topic.php on line 60