Can't load more than 9 ish vst without error.

[InanimateCrbnRod]

Hey I'm trying to use 16 instances of ReFx nexus in synthfont. It won't let me use multiple instances from the same vst, so I have to copy and paste the dll 15 times. When I try to load them up however after around 9 the program will start giving me an error and won't let me load any more of the vst. I have plenty of available computer resources. Thanks in advance for any help