playing music after downloading

well, first of all, when i download limwire it says that it is complete but one non fatal error occured. i do not understand what this means. Second of all, after i download music there are no play buttons and when i click lauch on a song it does not play. i dont know why this is. also when i go to tools, options there is no option that says player in order to turn this on. Whats the problem??? HELP!