Wait.

LimeWire now hashes files before making them available for download. This can take a long time. Files and folders will not be displayed until they have been hashed.

Look at the bottom left hand corner where it shows the number of files being shared.... This number will go up over time (slowly if your files are large).

LimeWire only needs to Hash files once unless you move or change the file. So - once LimeWire has spent an eternity hashing your files it will won't have to do so again.

Mark