In order to download fast - you need other people to allow fast uploads.

If you are downloading from someone who has a modem connection, it doesn't matter how fast your conenction is, it still has to pass through their modem.

If LimeWire can find multiple sources for a file it will swarm the file which should give increased download speeds - but only occasionally will you be able to download a file at the limit of your cable speed.

You can also try getting several files at the same time.

But in short - there's nothing wrong, that's just the way it is.

Mark