This is most likely a problem with the server. Try reinstalling FH (Save an presets, maps, etc) and reinstall from this site. (Get the setup)
If that doesn't work, make sure your internet is letting FH connect to the server. It sounds as if it isn't. Try lowering your firewall and only have FH open. (Don't have any other programs running.)
Also move closer to where you are getting your internet from, like a modem. Also try not to use public internet.
Also, have you downloaded anything? I'm not sure that would cause it though...
You could also try changing your FH rendering system. :)
Gook luck!
Try restarting your computer/laptop?