A TimThumb error has occured

The following error(s) occured:

The remote file is not a valid image. Mimetype = ''E:\Website\Dvbcn\wp-content\themes\skin\cache\timE8FC.tmp

Query String : src=http://vod.dvbcn.com/f10c5c56e07548ab8a4c21136d17e494/covers/1db366f49a124265885e877effc54456-00003.jpg&h=428&w=760&zc=1
TimThumb version : 2.8.13