XML error : Failed to load external entity in Zend Framework

[D-Wade]

I want to read data from XML file but it showing the following errors:Exception information:Message:simplexml_load_file(): I/O warning : failed to load external entity "/common/xml/demo.xml"Following is my code:\[code\]public function init() { require_once 'Zend/Config/Xml.php'; $xml = new Zend_Config_Xml('/common/xml/demo.xml'); echo $xml;}\[/code\]Any solutions...thanx