In the quickstart documentation, I found that the Zimbra Server can be run on a minimum 128kbps Connection

I am currently having 256kbps connection via a Router and All Portforwarding is set properly...

The problem with my mail server is that, the people having slow internet connections are not able to access my server at all..
The connection was reset The connection to the server was reset while the page was loading. * 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,

And for those who have good connection it takes 30-55 Seconds to load the initial login screen...

Can anyone tell where the problem is.. because, I am not using the bandwidth also..

My Zimbra is installed on Fedora Core 4