I've been running a single core 2.0Ghz firewire compatible MacBook Pro for four or so years with my FireFace 400.
Works like a charm, absolutely love my performance setup. Beautiful work, RME.

Now (Christmas presents!) I got a new computer! 2.5 Ghz quadcore, a new MacBook Pro that just has the USB 3.0 inputs and two ThunderBolts.
So I went out and decided to purchase what seemed to be the most reliable way to keep my FF400 connected to my system.

I'm now running my FF400 connected to the HDSPe ExpressCard/34 with the Sonnet Echo Pro ExpressCard/34 thunderbolt adapter with my new computer. I updated the firmware and the drivers for the FF400, HDSPe, and the Echo Pro, and I can't seem to get it to see the FF400!

Any help would be appreciated. Did I goof and go the wrong route here? I'm seeing that people are using their power cable and a TB->FW cable for data flow. That seemed unreliable to me, I can't afford for things to go haywire mid-set.

Thank you in advance,
-Austen