Routing issue RME Fireface Logic I/O

Hi,

Im trying to integrate an external hardware effect via Logic's I/O plug-in but I've reached a dead end...

I have an Fireface UFX interface with an Octopre MK2 Dynamic connected via ADAT (both ADAT in and ADAT out are cabled between the two devices)

The effect (Alesis Quadraverb) has its input (ADAT 15/16) and output (ADAT 9/10) cables going into the Octopre MK2 Dynamic.

When I press a key I can see in TotalMix that there is an output signal but no input signal (screen shot attached).

If I connect the effect to a stereo in and stereo out of the UFX the effect works perfectly.

One thing ive noticed though, it if I turn the Quadraverb on and of I can see a signal briefly jump into the 9/10 input.

I can also use synths via the Dynamic fine.

Im wondering if its an ADAT issue, a problem with the I/O or the routing in TotalMix

Any help would be gratefully accepted as it draining me a bit nuts.

Thanks in advance.

* Screen shots of the set up are attached. One shows the routing that isn't working, with the I/O. One shows the routing that works (via the UFX). Fireface settings also attached.

* I also have a Focusrite OctoPre connected to the UFX running at couple of synths: connected via ADAT and Word Clock. Ive tried unplugging this from the UFX but still have the same issue.