Digitest says my HD cards are working fine. So why aren't they working?

[tpcalm]

Hi, so I'm having a strange issue where Digitest reports no failures on my 6 HD cards in a PCI Magma Expansion Chassis. However, Pro Tools 10 HD crashes my entire computer if I try to enable anything beyond 1 DSP in the Playback Engine.

Upon restart of PT (after the entire computer crashes and I have to manually reboot) there is still never any change in the number of voices or DSP I have access to.

I've tried all kinds of different voice/DSP options and my entire computer will crash every time.

I know that my expansion chassis is transmitting information because the interface operates properly. It's just the additional cards that seem to not be accessible.

Does this sound familiar to anybody?

Thank you, love this forum btw. Didn't realize how many other people are still using the same legacy stuff I am.

System Information: Mac OSX 10.8.5 | 32GB RAM | 8 Processors | Quad-Core Intel Xeon | Digidesign 192 | Pro Tools HD 10