It sounds like possably a corrupt java download, &/or L/W Prefs folder prob
First! close L/W completly, then Go,
START/My Computer/local disc C:/ Documents & settings/Your User Name/Application Data
Now Delete the LimeWire Folder.
If you cant find Application Data Folder,GO to Tools/folder Opions,& tick,show hidden folders,
You can put the setting back afterwoods to protect your computer.

note: You will have to reset your, Tools/options in L/W Later.

Now! Go to,
START/Set Program Access/Change or Remove Programs,
now completely remove all versions of java.
Now! Use this Link to get JRE 6 u1 Use the off line installer NOT the (recormended) one,
Java SE Downloads
Disconnect from internet, close ALL apps n reinstall java.

Follow thease instructions exactly.

Dont forget to reset your options in L/W, Licence warning n stuff.
Go to Tools > Options > Searching > Lisence warning and make sure the box is not ticked and then select apply....
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Any Problems Shout.
Peace.

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mickjapa108