Ok it's more than likely your ISP that is blocking you from connecting to limewire ...
Review of CableOne - dslreports.com
But you may still like to try Port Forwarding...
Now you do have a Modem, you may not have a router but you have to have a modem...It's the thing that you plug your internet into...If you turn it upside down you will see the name and model number for it....I need this information, so I can give you your instructions on Port Forwarding...