thats for anumber of reasons, 1) those users might not be online at the sametime you are, 2) you are behind a firewall and are having trouble downloading because of it, or 3) you havent adjusted your LW settings to accept more sources 4) patience.

You are downloading off of fellow users and even if there are 20 sources available that doesnt mean they are online at the time you are. This happens to everyone on a P2P network.