How do I change the buffer size?

I just bought a Virus TI2 and when I load it into VST instruments I get this error:
“Virus TI has discovered a setup problem. The host is using an odd audio interface buffer size which causes communication problems. Please adjust the buffer size to any of the following values instead: 64, 128, 256, 512.”
The help manual I’m offered gives me Cubase 3 instructions. When I go into the Device Setup and VST audio system, there’s no example of the buffer size or a way to change it. What can I do?

Thanks in advance.

Control panel of the device.

Thanks. That made the error go away and I switched to the Virus ASIO USB driver but I can’t get it to produce any sound still. Any ideas?

EDIT: Got it to work, thanks.

Not if you don’t give details of routing and provide relevant screen shots.