UAD Capitol Chambers in Nuendo

I might be on my way into Nuendo territory and is demo’ing these days. One of my favorite plugs “Capitol Chambers” gives me big trouble as it overloads the software and I am not able to run it. I have a MacPro 12 core 3.46 64 Gbram - Apollo Firewire and a Quad Satelite. It runs without trouble in ProTools Ultimate and latest Logic version. Any ideas what might cause this - or is it bad programming from one of the companies - Steinberg and UAD? Any help is welcome - and thanks!


Could you try to increase the Audio Device Buffer Size, please?