error

Opening up the piano sheet music produces "Clocks" by Coldplay, but attempting to switch to any other song makes the sheet music disappear, including the one for Clocks, if I go back. I can still use my keyboard, and hear the pages turning, but no sheet book is produced. Pressing space to turn...

I keep getting this error when I join YukiTheater > [Lobby Music Player] Initialization Failed, Check your Custom Link (F4>Lobby Music Selector). I've changed the custom link to what I wanted, left it at default, changed to something else... nothing helps. Is there a way to fix it? Not really...