Hi yogi62,
I had the same problem when I bought the SX900 a few months back. I rang the store where I had bought it and asked that question. (the store gives you lifelong customer support when you purchase a KB from them). The chappie told me that pressing the Search button does not work for the playlist---apparently its not meant to-----he told me to:-
1. Press the 2 Registration buttons together (or the top of the screen where the reg is shown)
2. Then press Search.
3. Tap the bar next to Regist Search
4. Type song title (or just a word from the title) and the keyboard then searches everything including the Playlists and lists all the places where that song/music can be found.
This is warp speed compared to trying to find a song in the built in playlists
Hope this helps
Irene
PS-----Following the other posts below i have just timed it and it literally takes 5 seconds to find any song on the playlist or anywhere else on the keyboard and this is the method the Yamaha employees say to use.
Thanks for this Irene, and yes I did know about this way of doing it, where you are basically loading the Registration for the song.
It IS quicker, but seems to make the idea of even having playlists (old MFD files) pretty well superfluous.
Just very surprised that having had the alphabetical Music Finder database on every version of Tyros, and worked very well, that it wasn't carried over to the newer models.
Typing stuff in is all a bit of a pain and a bit old hat these days, but they call it progress I suppose..
That said my eyesight is pretty well shot I have enough trouble finding the keyboard

Keith.