Have patience. Version 2.5.5. of LimeWire includes a hashing feature. Each of the files you share is hashed (a number is created that is close to unique for the file - this has a number of uses).

The hashing process is a bit slow, more so for large files. A file will only appear in your library once it has been hashed - so if you wait a little longer, LimeWire will list the files that it has not yet listed.

LimeWire /could/ do it faster - but it has been deliberately set up not to use all your processor power during the hashing process.

Mark