Not sure if Pro makes any difference on torrents. Pro does allow 2 more hosts per download.

Are you using LW 4 or 5? Not that it makes a lot of difference.

uTorrent or Azureus would do better, as Sleepless suggested, as long as they are properly configured with program & its ports allowed through firewall & if necessary the router. Should never use same ports for any internet program. They clash & the router/modem will block out incoming ports used if they are the same as another program used during same log-in session.