I don't know whether actiontech supports UPnP. So I might suggest you manually port forward your device if you can't find any such UPnP setting.
The steps are:
1. Most important step is setting up a Static ip (see link below.)
2. Forward port 6346 as described here:
http://www.portforward.com/english/r...G/Limewire.htm
3. Within LW;
Manual port forward instructions & sample image & 2 posts after that.