bash: ./hello: 权限不够

pt@pt:~$ wget http://f.youku.com/player/getFlvPath/si ... 6a161b8fa5
--2011-03-19 10:29:41-- http://f.youku.com/player/getFlvPath/si ... 6a161b8fa5
Resolving f.youku.com... 121.9.204.146, 121.9.204.147, 121.9.204.148, ...
Connecting to f.youku.com|121.9.204.146|:80... connected.
HTTP request sent, awaiting response... 302 Found
Location: http://121.14.147.204/youku/596C64C4724 ... B1953E.flv [following]
--2011-03-19 10:29:41-- http://121.14.147.204/youku/596C64C4724 ... B1953E.flv
Connecting to 121.14.147.204:80... connected.
HTTP request sent, awaiting response... 403 Forbidden
2011-03-19 10:29:42 ERROR 403: Forbidden.
想下载youku上面的视频，出现这样的错误，是什么原因？