music player on duokan 2013?

I've just loaded this ((K3)2013-03-22.23469.rtm) onto my Kindle keyboard 3G (3.3) but can't work out how to get the audio player to work? Is it still disabled? I get a little control panel onscreen via the menu with a search window saying "Please use...unknown", but don't know where to go from here. If I press play it will play one mp3 file only. Also no music folder shows up on the home screen even though I have loaded one.
any thoughts appreciated! (is this duokan perhaps optimised for touchscreen?)
thanks

Bill