Turn your router off, leave it off for a few minutes, don't just restart it, you have to leave it off for a few minutes, then switch it back on and try again.
If it still doesn't work, it's unlikely it's your internet connection, so make a back up of your HGWC folder and download the one in the attachments, if that's not it, then it's not a problem with your HGWC, it could be X-trap or the Crossfire.exe, the ones that open after it.
You will have to redownload Crossfire again, but first get rid of the one you have, don't uninstall it, just delete all the files and then download it again.