Which OS are you using? OS X?
Is you are, it's possible that you haven't configured your firewall to allow LW to access the net.
Alternatively, you may have another firewall up.
If that doesn't work too, try deleting the prefs.

__________________
iMac G4 OSX 10.3.9
RAM 256MB
LW 4.10.5 Basic
ADSL anything from 3 to 8Mbps/around 1024kbps

"Raise your can of Beer on high
And seal your fate forever
Our best years have passed us by
The Golden Age Of Leather"
-Blue Öyster Cult-