Most V Collection plugins freeze when I try to change the buffer size

[santa]

I have just bought the V Collection and installed it on a Mac. I am finding that most of the plugins freeze and have to be forced to quit when I try to change the buffer size. This happens, for instance, with Prophet 5 V and Synclavier V, among many others. This happens even with a very modest change of buffer size to 256 samples. How do I fix this?

[LBH]

Hi,

Does the applications freeze, when you change the audio settings in the applications like in Prophet-5 V and in Synclavier V standalone applications or in your DAW when you use plugins? Which plugin format do you use in your DAW?
Which soundcard do you use?