Worked until last week, now no connection , WHY????

[deelovesdis]

I have Limewire 4.18 suddenly last week it just stopped connecting. I have had Limewire Pro for over a year now without any problems. I have tried everything to connect, I deleted preferences, I uninstalled Limewire and reinstalled limewire. I uninstalled Java and reinstalled Java. I deleted gnuetella file. I checked my firewall, it is configured to accept Limewire. I installed Limewire 5 and same thing cannot connect.
THis is what I have,
WIndows Vista
Dual In-line Memory Module,1G 667M,128X64,8,240,2RX8,
Hard Drive,320G,
Processor,E4500,2.20,2M,Core Duo-Conroe,M0
I connect via Cable , with Cablevision in long island
I do not have a router.
I did the test and it said "you passed the test"
218 gigs free
connect from the house

I have the same computer for the past year, so nothing is new or changed on my end. Everything was working fine until last week, and suddenly cannot connect.
I have windows Vista, Dell Computer, I am the only user, no other computers in the house.;
Now what? I am ready to just uninstall and find another P2P website. I am going crazy trying to get this thing to work!!
Dee