Cubase 6 + Cubase 5 synchronization

Off late i have been getting latency trying to synchronize Cubase 6 running on my Mac osx 10.6.8 and Cubase 5 running on Windows XP. I do this mainly to use some VST plugins which don’t have MAC OSX versions and even to save some CPU resources as well. Here are the issues

  • There is a latency in synchronization
  • The play head of the slave cubase 5 doesn’t move

I have several tempo and time signature changes in my master cubase 6, so is this what affecting the synchronization?

Just how are you going about synchronising the two?