Don't know how port forwarding is going to help. WGT uses several servers, so I'm not sure about an IP address.
Have you checked flash version (get.adobe.com)? Cleaned ALL cache and cookies (CCleaner and Advanced System Care are the best cleaners)? Checked your internet speed (speedtest.net)?
Also, try using a different browser. Sometimes, after downtimes/updates, the meter gets jumpy for some people.