A requery has been sent and your client is waiting now for new search results. Every three hours LimeWire requeries the network for the file you wanted to download for the next seven days (if your client keeps running that long). Either LimeWire finds a location to download from (then it will do so) or it won't (and then it won't download anything). If you try downloading files you found many times, LimeWire should start downloading at once. Otherwise you have to hope that the host you want to download from has free upload slots which isn't always the case.