Do you use any other p2p apps? If so, do you get the same low speeds?
Do you see the firewall icon (brick wall in front of the blue earth)?
Try downloading a file from here & see what speeds you get
http://www.magnetmix.com/video.shtml

Have you seen this sticky about configuring LW for best performance
http://www.gnutellaforums.com/showthread.php?t=27036

It could be that your ISP shapes bandwidth. How good's your connection (fair, excellent etc)?

Give some details

OS(Win XP etc)
LW & Java version (help > about LW & you'll see)
Firewall you're using
Modem/router brand & model
ISP
Connection type (DSL etc)
Where you connect from (home, school etc)
Are you sharing a connection with other computers
Is this your first try with LW