Firefox won't upload

I've just download the latest update in Firefox and when I'm about to start it says that...

Unable to connect

Firefox can't establish a connection to the server at en-us.start2.mozilla.com.

* 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.


When I tried opening a page in Internet Explorer it just went smoothly. It has an internet connection and I can go to different sites and download too....

Can anyone help me, how to fix this problem? :cry

 

Thanks a lot!