Same problem with mine. My download bandwidth plays between 10 to 15KB/s only.
My PC system are as follow:

1. OS version? (eg: Windows 98) XP pack2
2. What firewalls you have? Windows
3. How much ram? 480MB
4. Hard Disk space available? 13.8GB drive(C) (LW installed). Shared files in drive D with available space of 15.7GB.
5. Connection type? (eg: dialup, broadband, cable, etc.) 128KB/s
6. Modem & router brand name & model numbers? Speedtouch 585v6
7. Where are you trying to connect from (house, appartment complex, school, student accomodation, work, etc.)?
8. What version of LimeWire (LW) & Java do you have? (Go to LW's menu Help>About LW...) Will show both LW & Java version. LW-4.12.3 Pro, Java 1.6.0_02
9. Who is your ISP (Internet Service Provider)? ARABSWELL
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? 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. 2-months now
13. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface? Just recently cleared (thanks to UK Bob)
http://www.gnutellaforums.com/attach...1&d=1158099342
14. For those using a modem/router, how is your modem/router set up...are you port forwarding or is UPnP enabled? Port forwarding
15. What security programs are you using (antivirus etc)? Some people might not be aware that their security suite includes a firewall Kaspersky (no firewall)
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) Saudi Arabia


I tried java version 1.5 to no avail. There are instances that my LW is not responding (something like paused). When recovered, my download bandwidth stays at 32KB/s for few seconds then it starts to reduce until 10 to 15KG/s only.