kirbywirby, rather than turning off your firewall have you tried configuring it to allow LW? Lots of instructions here
Firewall setup

Do this test & see what your result is
http://www3.limewire.com:6346

Read through this, it has heaps of info
Connection problems? Check here first!

What are your details?

OS(Win XP etc)
LW & Java version (help > about LW & you'll see)
Firewall you're using
Modem/router brand & model
ISP
Connection type (DSL etc)
Where you connect from (home, school etc)
Are you sharing a connection with other computers
Is this your first try with LW

Do you see the brick wall firewall icon?