ALL files found with LimeWire are shared on the gnutella network, so YOU are a "LimeWire" server too.
magnetmix is running a gnutella server (using LimeWire), and it's usually up, has good speeds, and lots of open slots. That;s why I call it a "reliable" server.
If you are having trouble downloading, it's often because the others you connect to often close, can be slow, busy, or even buggy.
If you are concerned that your setup is not ideal, checking downloads against a known reliable source can be a good idea.
Does that help explain why I suggested magnetmix?