Andi,
What I did is to load Bass Trombone+ and bass trombone+ Expr map it doesn't work so I reloaded to bass trombone and bass trombone map this time it work...I encontered same problem with trombone + tuba + bass clarinet +...
May be I havent enough ram ( 8 gigas ) on 64 bits windows and cubase 5 64 or what is it ????
Thank you