1. what OS version (eg: Windows 98, XP,OSX, Vista) ?
2. What firewalls you have ?
3. How much ram ?
4. Hard Disk space available ?
5. Connection type (eg: dialup, broadband, cable, etc.) ?
6.Modem what brand name & model numbers ?
7.Router brand name & model numbers ?
8. Where are you trying to connect from (house, apartment complex, school, student accommodation, work, etc.) ?
9. What version,LimeWire & Java, are you using. Go to L/W's Help/About L/W, THIS show both LW & Java version.?
10. Who is your ISP provider (Internet Service Provider) ?
11. Do this test click here: http://www3.limewire.com:6346/ should say 'Your test worked!. What happens ?
12. Are you sharing the connection with other computers or p2p sharing programs? If yes, please give details of set up.
13. Is this your 1st try at LW, or is this a new problem with an experienced user.?
14. Do you see a brick wall in front of the blue world icon at the bottom of LW's interface ?
15. Have you given full permissions for LimeWire to pass through your Firewall ?
16. XP users, Please state XP firewall on or off.?
17. In Start & remove Programs, Is this update Installed, "Security Update for Windows XP (KB931261)" ?
If Windows Updates are not seen, Tick the box at top of page, (show updates)
18. Are you using Manual Port faward in LimeWire OR UPnP ?
You can check HERE, IN LimeWire Go, Tools/options/advanced/firewall Config

1 xpsp2
2 sunbelt/kerio
3 1 gb
4 40 bg
5 broadband
6 no
7 no
8 apartment
9 4.12.14 1.6.0
10 telia
11 my test worked
12 no
13 experienced
14 no
15 yes
16 off
17 yes
18 upnp

i dont use lw that often but it worked (as always) one month ago. since then i treid to dl wellknown songs with 200 souces or so to test but no luck.
normally with 10 sources i could dl from 8-9 at 200k.
KB931261 was installed 2007 04 18 so i dont belive thats the problem