This might not make any difference but go to your LW menu bar, Tools>Options>Downlds & increase the max. downlds by a couple. Then do another search for the topic. Even stop the downld & reselect it from the search results.

Let's hope your problem is not due to your ISP using a p2p bandwidth filter or shaper. Like this one http://www.sandvine.com/products/p2p_element.asp