i am also have the same problem in sonicstage 3.4. i was able to convert mps to atrac format and transfer them to my HD5. but after installing sonicstage 3.4 i am getting error msg. this are some of the topics ATRACLife that might help and related. plz advise. http://www.atraclife.com/forums/index.php?showtopic=1389 http://www.atraclife.com/forums/index.php?showtopic=1401 http://www.atraclife.com/forums/index.php?showtopic=1311