Then it's not a whitelist issue - it does sound like it may be an issue with your firewall or antivirus, though. There have been reports of similar problems running Avast antivirus in windows 8, and I think Avira has caused issues with utorrent as well. If you have either of those installed, try uninstalling them (if doing so solves the issue, make sure to install a good replacement, of course). Or if you use a different program, try disabling it temporarily to see if that helps the issue.