Unable to resolve .. resolve waits for ever while building red5 using ant and ivy

I am following step by step for installation of RED5 in Ubuntu 9.04.

While executing ant command, it waits forever at

[ivy:resolve] :: resolving dependencies :: red5#server;working@satya-vbox4red5
[ivy:resolve]  confs: [java6]

in verbose mode, I saw that it is failing while searching for dependencies.. verbose output can be found at http://pastebin.com/uyaQ03cK

I am accessing the internet through a proxy serve开发者_JAVA技巧r which asks for authentication(userid and password).

Try configuring ANT to use the proxy:

<setproxy proxyhost="${proxy.host}" proxyport="${proxy.port}" proxyuser="${proxy.user}" proxypassword="${proxy.pass}"/>