I can think of 2 possibilities. One is that your LW media player is disabled. If you really want to use it, go to LW's Preferences (hold down apple/command key & comma) >Player & tick option to use media player. This won't have any effect until next time you open LW. But I'm surprised as an OSX user you'd bother much with the media player. Most people use iTunes instead. But if QT launches instead of iTunes then it sounds like your default player is not iTunes. Are your mp3's showing up with a QuickTime icon? Outside of LW, on the desktop, select an mp3 & Command & i keys & choose open with iTunes & choose always to use. BTW LW's media player is only for music. It's not designed to play videos. Get VLC - (click on link) _ (choose nearest mirror site) OR XinePlayer, OR MPlayer to play videos.

Go to the LW Library window (press the Library tab), & if you can't see a playlist window at the bottom of the window then drag the bottom up so it becomes visible. See Drag window paritition up (click on link) image example. Other options: 1. Click on the small arrows on the LW main window. If that doesn't work click the other arrow. 2. Drag the partition up or sideways; see examples here: Example A (click on link) & also Example B (click on link) (click on arrows to show single window)

__________________
Imagination is more important than knowledge. -- Albert Einstein
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
640 K [of computer memory] ought be enough for anybody. -- Bill Gates (1981)
The secret to creativity is knowing how to hide your sources. -- Albert Einstein
When facts don't fit the theory, change the facts. -- Albert Einstein
Religion keeps the poor from murdering the rich. -- Napoleon Bonaparte
The important thing is not to stop questioning. -- Albert Einstein
I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones. -- Albert Einstein
"A composer is a guy who goes around forcing his will on unsuspecting air molecules, often with the assistance of unsuspecting musicians." -- Frank Zappa
"Tobacco is my favorite vegetable." / "May your sh*t come to life and kiss you on the face." / "Scientology, how about that? You hold on to the tin cans and then this guy asks you a bunch of questions, and if you pay enough money you get to join the master race. How's that for a religion?" / "Communism doesn't work because people like to own stuff." / "There are three things that smell of fish. One of them is fish. The other two are growing on you!" / "Jazz is not dead, it just smells funny." / "The creation and destruction of harmonic and 'statistical' tensions is essential to the maintenance of compositional drama. Any composition (or improvisation) which remains consonant and 'regular' throughout is, for me, equivalent to watching a movie with only 'good guys' in it, or eating cottage cheese." / "Remember there's a big difference between kneeling down and bending over." / "The most important thing to do in your life, is to not interfere with somebody else's life." / "Rock journalism is people who can't write, interviewing people who can't talk, in order to provide articles for people who can't read." -- Frank Zappa
"The music business is a cruel and shallow trench, a long plastic hallway where thieves and pimps run free and good men die like dogs. There's also a negative side." - Hunter S. Thompson
The shy can light the dull dark room with life when their eyes mirror their inner sunrise - LOTR