Hi after update on MacOS 10.5.7 and installing the avira Premium Security Suite 2009 it is no longer possible to use the coherenzy modus in Parallels 4 (german version): Message: »change on coherenzy-modus is not possible. The serve mouse-sychronisation was'nt started. ...« I tried to install Parallels Tools again and again: always the same result. Also I installed Parallels 4 again. What can I do? Please help.