Pro Tools 9 HD won't recognize my 192 interface

[innerbooty]

Greetings,
So I upgraded to PT 9 HD about six months ago. I use 2 Apogee Rosetta 800's as my main interfaces. For HD, I bought 2 used X-HD cards for the Rosetta's. They sort of worked, but I had flaky-ness. Sometimes they would lose the connection to HD. So I tried to upgrade the firmware, a process dating back to the middle ages, where you plug a midi cable into the X-HD card and send a midi data dump. Worked on the 1st card, but wouldn't take on the 2nd, so now I only have 8 channels of I/O, since the unit with the old firmware no longer plays nicely with the 1st unit. Apogee wants $225 just to fix the card, which is only worth about $175, so I thought I'd buy a used 192 with a couple of digital I/O cards. Then I could use the ADAT optical on the Rosetta's, which is tried and true, sell the X-HD cards, and also have room for some expansion I/O on the 192. And I work almost exclusively in 44.1 or 48.

Got a tested 192, with a warranty, with 2 digital cards pre-installed. The seller even tested the unit with Pro Tools 9 for me, not sure how thoroughly. I plug the Digilink cable from the Core card into the 192 primary port. (This same Digilink connection works fine with my Apogee X-HD). When I turn on the 192 the light is orange, but then turns green when the Mac Pro is turned on. The sample rate and clock source lights go solid. But when I try to load Pro Tools I get the "no interface found" message. I can't load with the "HD TDM" setting from the Playback Engine. I'm forced to quit Pro Tools. This happens whether or not I have the Rosettas connected via the ADAT optical on the 2 digital cards, or even off the optical I/O on the main192 section.

I ran Digitest with the 192 connected (w/out the Apogees) and everything passed, and it saw the 16 channels of I/O. I also double-checked that I have the B > A connection set properly between the Core and Accel cards. I also tried loading the system with my old 888|24 connected to the Legacy port. Nothing has worked so far. I'm on Mountain Lion, which has been working just fine, but tried under Snow Leopard just to check, and still no luck.

Sorry for the long-winded email, just trying to give all the info. Any help would be appreciated! Thanks - Steve