Bootcamp problem on Mac Pro 5,1 with Velocity Solo x2 SSD

Hi all

Got Mac Pro 5,1 with Velocity Solo x2 SSD.
I tried setup Windows 7 via Bootcamp and SSD is not visible when I need select drive where Windows will be installed.

I removed SDD from Solo to normal HDD bay and all works fine.
Windows installed but when I fit SSD to Solo again and hold 'alt' Windows is available but when I select it then Mac is frozen.

Any idea for solve that?

I tried install Windows on second HDD when SSD is in Solo but after OS X restart when OS creating partition for Windows screen is just white.

Any help will be appreciated