These kind of problems are usually traceable to the way the VST was written. It is kind of a Wild West out there as regards VSTs, sometimes the VST was written before certain things were standardized, other times the thing may be "newer" than what the host program was written to handle, then there's the known issue with RB and PT in which certain VSTi's that need some sort of Timing Data don't work fully.

At the end of the day, free VST plugins may be worth what you paid for them.

On the other hand, when you find some that work and work well, be happy.


--Mac