I've tried deleting the preferences, altering my firewall, updating Limewire... all to no avail.

I've got DSL that is networked through the phone lines. A filter runs from my phone jack to my internal modem... No idea what brand names are.
Limewire worked fine for the first few weeks I had it. One day I double clicked the exe, nothing happens. I tried reinstalling. Nothing. I wouldn't mind a little help on the matter.