A fresh install of both Java & LW using both of their "Offline" installers & deletion of prefs folder should do the trick.

BTW did you configure your firewalls & modem/router for upnp/port forwarding; Connection problems? Check here first! (click on link)

I've done all of those things..

Well if you've tried all those things to the letter then the problem is your system. Reformat your computer & reinstall everything for a fresh start. You obviously have a corrupted system. Otherwise play around with kazaa.

__________________
Imagination is more important than knowledge. -- Albert Einstein
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
640 K [of computer memory] ought be enough for anybody. -- Bill Gates (1981)
The secret to creativity is knowing how to hide your sources. -- Albert Einstein
When facts don't fit the theory, change the facts. -- Albert Einstein
Religion keeps the poor from murdering the rich. -- Napoleon Bonaparte
The important thing is not to stop questioning. -- Albert Einstein
I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones. -- Albert Einstein
"A composer is a guy who goes around forcing his will on unsuspecting air molecules, often with the assistance of unsuspecting musicians." -- Frank Zappa
"Tobacco is my favorite vegetable." / "May your sh*t come to life and kiss you on the face." / "Scientology, how about that? You hold on to the tin cans and then this guy asks you a bunch of questions, and if you pay enough money you get to join the master race. How's that for a religion?" / "Communism doesn't work because people like to own stuff." / "There are three things that smell of fish. One of them is fish. The other two are growing on you!" / "Jazz is not dead, it just smells funny." / "The creation and destruction of harmonic and 'statistical' tensions is essential to the maintenance of compositional drama. Any composition (or improvisation) which remains consonant and 'regular' throughout is, for me, equivalent to watching a movie with only 'good guys' in it, or eating cottage cheese." / "Remember there's a big difference between kneeling down and bending over." / "The most important thing to do in your life, is to not interfere with somebody else's life." / "Rock journalism is people who can't write, interviewing people who can't talk, in order to provide articles for people who can't read." -- Frank Zappa
"The music business is a cruel and shallow trench, a long plastic hallway where thieves and pimps run free and good men die like dogs. There's also a negative side." - Hunter S. Thompson
The shy can light the dull dark room with life when their eyes mirror their inner sunrise - LOTR

Well, Limewire has always worked.. All my other things work.

Did this only happen after upgrading to 4.12.6?
No reason why it should work but have you tried going back to an earlier version, like you used when LW was running ok?

I downloaded Limewire 2.04 and it works.

Is that 4.2.04??? That's pretty old

Ok Limewire 4 works too.. I guess I'll stay with this.

AAAAAAAAAH

I've uninstalled every java I had on my computer, uninstalled everything from Limewire, reinstalled all of it, still doesn't work. Then I removed Java, and that was the closest I ever got to running Limewire when it said "Go to java.com and download java"!!! Then I tried going to java.com and installing a different version of Java, still didn't work!!

I can't run Limewire 4 anymore, it sucks ******* terribly, its slow as hell and I'm not used to it.

ermmm...whilst I use the Fbomb all the time, I gotta say that yur nick is a tad over the top for most any forum...

anyways, it seriously sounds to me like you've got some other issue besides LW...a type of issue usually caused by downloading some sort of BAD file...it wouldn't surprise me in the least bit if it was a file 'supplied' by the MAFIAA that was intended to make LW not work...now, since I have no earthly idea of just exactly what it did to your OS I can be of no help in that regards...but, I am quite sure that reformatting your HDD and doing a clean install and then reinstalling LW will work..sorry for the bad news, but its a fact of life if you wish to be a file sharer...I've had to do it quite a few times myself, so don't feel alone...