I have a fast cable connection (100Mbs) but I only get download speeds of 20-30 kbs in Limewire. Any ideas?

Do a speed test & tell us the results.
Speedtest.net - The Global Broadband Speed Test

Download a file from here & see what kind of speeds you get.
Magnetmix

Have a look here & try the tips from murasame (first few posts).
A few things to consider while configuring Limewire for optimal performance...

Give us your system details.
System details - help us to help you -> Provide these details when you post!!!(click on link)

Speed Test
-----------

Download: 422 kilobits/second
Upload: 18 kilobits/second
Server: Austin, TX
Ping: 999 ms
Distance ~50mi

File Download Test
------------------

Magnetmix Download: 13 kiloBytes/second

Limewire Options Configured
--------------------------

Limewire Options:
Uploads.Basic: 13.12 KB/s
Uploads.Slots:
1 Upload per person
10 Max upload slots

Speed.Cnx: Cable/DSL
Speed.OOB Searching enabled


Downloads:
Max Downloads: 8
Bandwidth: 10 KB/s


System Information
-------------------

Dell Inspiron 8200
Windows XP Pro SP2
Mobile Intel Pentium 4-M CPU 2.40 GHz
1024 MB RAM
Page file: 871MB used, 1590MB available
DirectX 9.0c


1. OS version? (eg: Windows 98)

Windows XP Pro SP2

2. What firewalls you have?

McAfee

3. How much ram?

1024 MB

4. Hard Disk space available?

5.6 GB

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

Cable

6. Modem & router brand name & model numbers?

Linksys RangePlus Wireless Router WRT100

7. Where are you trying to connect from (house, appartment

complex, school, student accomodation, work, etc.)?

Apartment complex

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 4.14.10 Pro
Java 1.6.0_03

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

Time Warner

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.

I've downloaded a few hundred audio files

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

No

14. For those using a modem/router, how is your modem/router
set up...are you port forwarding or is UPnP enabled?

UPnP is enabled


15. What security programs are you using (antivirus etc)? Some

people might not be aware that their security suite includes a

firewall

MaAfee Antivirus and 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).

USA


Thank you.

well you have to think that some people limit how much bandwidth they allow for uploads and what there internet connection is.

Sdwillia

I am going to make a couple of assumptions:-

1) Your Internet connection is a facility provided via your apartment's owners.

2) Your Internet providers are "bandwidth shaping" (restricting) your P2P communication while letting your browsing connection through untouched.

If my first assumption is correct then I suggest you call your ISP and ask them if they are restricting your P2P connection.


UK Bob