Error reading file 'C:\Program Files\OpenERP 6.1-20140508-233721\Server\server\openerp\addons': failed to load external entity "C:\Program Files\OpenERP 6.1-20140508-233721\Server\server\openerp\addons"

(<type 'exceptions.IOError'>, IOError(u'Error reading file \'C:\\Program Files\\OpenERP 6.1-20140508-233721\\Server\\server\\openerp\\addons\': failed to load external entity "C:\\Program Files\\OpenERP 6.1-20140508-233721\\Server\\server\\openerp\\addons"',), <traceback object at 0x03302E40>)

 i have this error when to display a jasper report in openerp.. im use openerp v6.1.. can anyone help me to solve this error?