First thing to try is delete LW's preferences folder when LW's properly closed. See point 3 here & also point 2 if you've used older versions of LW in the past (there could be a folder in either location).
Fixes for LimeWire
This will change all of your settings within options, you'll have to go back through afterwards & reset things. If you're not sure of your settings, go through LW's tools > options & write them all down, so that you can reset things later.
In case you're using Vista: LimeWire Pref Folder in Vista

If that doesn't help, you'll need to give us a few details.
System details - help us to help you -> Provide these details when you post!!!

Hi Curtgruber

I had this same problem and I fixed by:-
[1] Uninstall the old version before installing the new -- delete the old LW folders from the Programs directory before installing the new version
[2] Ensure that you have java script J2SE Runtime Environment 5.0 (Jre ver 5) if not download from here:-

Archive: Download Java 2 Platform Standard Edition (J2SE) 5.0 Update 11

* Uninstall Limewire by using LW uninstall program not the add/remove control panel
start -> all Programs -> Limewire -> Uninstall

Hope this helps -- please let us know -- Thanx

__________________


Limewire links: (If LW 5 will not connect) (If LW 4 will not connect)(system details) (LW Clean Reinstallation Instructions) (setting up your firewall to accept LW)

LW links are changed at times to match the current problems.

1. OS version? (eg: Windows 98) If using Windows Vista, please tell us whether you have an Administrator user account.

Windows Vista. I have the administrator account.

2. What firewalls you have?
Spyware and Trendmicro Antivirus

3. How much ram?

2038 mb
4. Hard Disk space available?

...unknown.
5. Connection type? (eg: dialup, broadband, cable, etc.)

DSL
6. Modem & router brand name & model numbers? (eg: Linksys WRT54Gv4)

modem- westell wirespeed.
Router - Buffalo high speed
7. Where are you trying to connect from (house, appartment complex, school, student accomodation, work, etc.)?

House.
8. What version of LimeWire (LW) & Java do you have? (Go to LW's menu Help bar > About LW...) Will show both LW & Java version. _ Click to see Sample image
*It's very important that you tell us whether you're using LW 5*

USing limewire 5.0.11
9. Who is your ISP (Internet Service Provider)?

Verizon.
10. Do this simple test for us. Using your browser go here: http://www3.limewire.com:6346/ The page should say 'Your test worked!'. What happens when you go there?

It says your test worked.
11. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up.

no.
12. Is this a your 1st try at LW or is this a new problem with an experienced user

new problem with experienced user.
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? _ click here to see Sample image
If you're using LW5, there's no firewall icon. In LW go tools > advanced tools...there you'll see whether you're behind a firewall or not.

It says I am behind a firewall and do not support firewall transfers.
14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled?

upnp enabled.
15. What security programs are you using (antivirus etc)? Some people might not be aware that their security suite includes a firewall
antivirus and spyware.

16. What country are you living in? Sometimes there are ISPs with the same name in more than one country (eg Clearwire in the USA & also in Ireland).

United States.
17. Has anything in your setup changed recently? Have you updated your version of LW or Java? Have you added any new software or new hardware? Have you updated any software? Have you moved house, changed internet plan or ISP etc etc?

I updated my limewire.

May I ask which model of Westell Wirespeed (it should have a model number)? Reason I ask is Westell modems & routers do not utilise UPnP at all well. And not all Westell devices that have NAT abilities even have UPnP implementation.

Which model of Bufalo router?

I suggest starting here:
1. You will have Vista's firewall on your computer, make sure LW is allowed in it's firewall rules. Setting up an exception for LimeWire in your software firewall (click in link). If it's already listed, you may need to remove that firewall rule & add a fresh one. Perhaps the old LW listing is not applicable to the newer LW 5 version whilst it's using Java 6 (1.6).

2. If LW Will Not Connect (click on the blue link)