FTP Server Access

Hi All,

I am having a problem while connecting to any ftp server through squid. Previously it was well, but now i m having the following message on browser:

The connection has timed out

The server at ftp.hp.com is taking too long to respond.

* The site could be temporarily unavailable or too busy. Try again in a few
moments.

* If you are unable to load any pages, check your computer’s network
connection.

* If your computer or network is protected by a firewall or proxy, make sure
that Firefox is permitted to access the Web.