Thunderbolt to FW800 to FW400...

Here's the deal...
I have brand new Mac, with Thunderbolt and Presonus Firestudio 2626 audio interface with FW400 connections.
Now... I got Thunderbolt to FW800 adapter, FW800 to FW400 cable, and here this gets interesting... My Mac won't find this interface at all, no matter what.
Is there anybody with similar situation? I read somewhere, that FW800 to FW400 cable has to be "bilingual". So I bought one, at least they say it's bilingual.
No luck...
Somewhere back in my mind something tells me... "Back to PC", since that audio interface works perfectly with my PC.
Help me, please!

Hi all,
I just restarted the iMac with everything plugged in and it works fine. (headslap) Duh.
Thanks anyway!
-B

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