Perhaps you could detail exactly what you are trying to do? It sounds as to you are behind a proxy and are trying to access a page which required user authentication. You may want to look at the Proxy attributes
in the LWP::UserAgent
documentation. If this is no help, please post the complete code you have, the error message (in full) and a better description of your circumstances (for example, are you behind a proxy server that requires a username and password before you can view webpages) and what you are trying to achieve. Also please read the PerlMonks FAQ
and How do I post a question effectively?
if you have not already done so.