Try searching for something really popular.
If nothing doesn't seem to come up regardless of what you type, then maybe it's time to consider reinstalling LW. First try deleting the preferences folder before doing any uninstalling and/or reinstalling.
Also, make sure you have the latest Java.

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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-