Are you sure you have UPnP enabled on your Linksys device? Double-check.

Go to LW's prefs, keyboard shortcut is apple/command key & comma ⌘ ,

Go to advanced -> Firewalls & check that it's set to UPnP.

Go to Speed setting & disable ultrapeer settings. Set the speed which is equivalent to your connection speed. I set it at modem because my speed is only 256 kbps. Likewise make appropriate settings in slider for downloads & uploads options.

Go to Connections & disable connect at start up. Instead, wait a few mins after opening. Then go to File menu -> Connect.

You can post attachments in your post if you wish. Max size is 100 KB per image & 5 images per post. You need to press Post Reply or Go advanced to get image attachment options.