lol in most circumstances you cannot do a search using LW & it come up with results of your own shared files (though in rare cricumstances it's been known to happen.) Having that ability would be a waste of LW's search energy & resources. You'd need to try & search the file from somebody else's computer.
If it's in one of your shared folders, people will find it. Go to LW's menu Tools>Options>Sharing & check that this folder is shared. Also go to your LW Library window & click the arrow next to the folder name to open it. If your file is listed, it means it is being shared. Also in the Hits column to the right side, you can see how many times it's been seen by other people. Under the Uplds column you can see if anybody or how many people have uplded it. Hope this helps!