You are. If your MD outs are connected to the audio interface, then they are connected to your computer.

I really think you are doing too much at once - so eliminate as much as possible.

Make sure computer audio is coming through the focusrite using headphones.
If you can’t do this - then stop - and get it to work.

Now…
Focusrite outs to MD in.
Headphones into MD.
ILEV at 64. Turn MLEV to 0.
Turn up the cue volume on yer RAM machine to make sure your getting sound into the MD.
If you can’t get this far - stop - make sure you get this to work.

Then…
Push the RAM record trig.
Wait a few seconds while it samples.
Push the RAM play trig.
You should hear your sample.

From this point you can try to further the setup, routing it back to the focusrite or whatever - but point is, do one thing at a time.